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20021222001 = 3113119571087
BaseRepresentation
bin10010101001010110…
…111001101001110001
31220200022110110100210
4102221112321221301
5312000413101001
613110404134333
71306100402424
oct225126715161
956608413323
1020021222001
118544504470
123a690973a9
131b70bc8331
14d7d04b9bb
157c2a5ddd6
hex4a95b9a71

20021222001 has 16 divisors (see below), whose sum is σ = 30061191168. Its totient is φ = 11742651600.

The previous prime is 20021221991. The next prime is 20021222017. The reversal of 20021222001 is 10022212002.

It is not a de Polignac number, because 20021222001 - 219 = 20020697713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20021222041) 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, 9784521 + ... + 9786566.

It is an arithmetic number, because the mean of its divisors is an integer number (1878824448).

Almost surely, 220021222001 is an apocalyptic number.

It is an amenable number.

20021222001 is a deficient number, since it is larger than the sum of its proper divisors (10039969167).

20021222001 is a wasteful number, since it uses less digits than its factorization.

20021222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19571132.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20021222001 its reverse (10022212002), we get a palindrome (30043434003).

Subtracting from 20021222001 its reverse (10022212002), we obtain a palindrome (9999009999).

The spelling of 20021222001 in words is "twenty billion, twenty-one million, two hundred twenty-two thousand, one".

Divisors: 1 3 11 31 33 93 341 1023 19571087 58713261 215281957 606703697 645845871 1820111091 6673740667 20021222001