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22212021000021 = 37404007000007
BaseRepresentation
bin1010000110011101000111…
…00111110001011101010101
32220122110002221020010002020
411003032203213301131111
510402410204334000041
6115124021145003353
74451523405213156
oct503164347613525
986573087203066
1022212021000021
117094079874286
1225a8a08a83559
13c5177a472428
1456b0d351592d
15287bbb805866
hex1433a39f1755

22212021000021 has 4 divisors (see below), whose sum is σ = 29616028000032. Its totient is φ = 14808014000012.

The previous prime is 22212020999999. The next prime is 22212021000053. The reversal of 22212021000021 is 12000012021222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22212021000021 - 26 = 22212020999957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212021007021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3702003500001 + ... + 3702003500006.

It is an arithmetic number, because the mean of its divisors is an integer number (7404007000008).

Almost surely, 222212021000021 is an apocalyptic number.

It is an amenable number.

22212021000021 is a deficient number, since it is larger than the sum of its proper divisors (7404007000011).

22212021000021 is an equidigital number, since it uses as much as digits as its factorization.

22212021000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404007000010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22212021000021 its reverse (12000012021222), we get a palindrome (34212033021243).

It can be divided in two parts, 2221202 and 1000021, that added together give a palindrome (3221223).

The spelling of 22212021000021 in words is "twenty-two trillion, two hundred twelve billion, twenty-one million, twenty-one", and thus it is an aban number.

Divisors: 1 3 7404007000007 22212021000021