21000032103122 has 16 divisors (see below), whose sum is σ = 33418518698520. Its totient is φ = 9862952779008.

The previous prime is 21000032103059. The next prime is 21000032103157. The reversal of 21000032103122 is 22130123000012.

It can be written as a sum of positive squares in 4 ways, for example, as 20891673289081 + 108358814041 = 4570741^2 + 329179^2 .

It is a super-2 number, since 2×21000032103122² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21000032103122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 606709613 + ... + 606744224.

Almost surely, 2^{21000032103122} is an apocalyptic number.

21000032103122 is a deficient number, since it is larger than the sum of its proper divisors (12418486595398).

21000032103122 is a wasteful number, since it uses less digits than its factorization.

21000032103122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213454365.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21000032103122 its reverse (22130123000012), we get a palindrome (43130155103134).

The spelling of 21000032103122 in words is "twenty-one trillion, thirty-two million, one hundred three thousand, one hundred twenty-two".