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21021011022 = 23111013153467
BaseRepresentation
bin10011100100111100…
…110010110001001110
32000020222202000001210
4103210330302301032
5321022334323042
613353521115250
71342630434264
oct234474626116
960228660053
1021021011022
118a078a3790
1240a7a88b26
131ca009047b
141035b42434
158306eca9c
hex4e4f32c4e

21021011022 has 32 divisors (see below), whose sum is σ = 46318137984. Its totient is φ = 6306932000.

The previous prime is 21021010961. The next prime is 21021011027. The reversal of 21021011022 is 22011012012.

It is a junction number, because it is equal to n+sod(n) for n = 21021010989 and 21021011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021011027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1570068 + ... + 1583399.

It is an arithmetic number, because the mean of its divisors is an integer number (1447441812).

Almost surely, 221021011022 is an apocalyptic number.

21021011022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21021011022 is an abundant number, since it is smaller than the sum of its proper divisors (25297126962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21021011022 is a wasteful number, since it uses less digits than its factorization.

21021011022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153584.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21021011022 its reverse (22011012012), we get a palindrome (43032023034).

The spelling of 21021011022 in words is "twenty-one billion, twenty-one million, eleven thousand, twenty-two".

Divisors: 1 2 3 6 11 22 33 66 101 202 303 606 1111 2222 3333 6666 3153467 6306934 9460401 18920802 34688137 69376274 104064411 208128822 318500167 637000334 955500501 1911001002 3503501837 7007003674 10510505511 21021011022