21031030203122 has 64 divisors (see below), whose sum is σ = 33924639767040. Its totient is φ = 9761498562816.

The previous prime is 21031030203091. The next prime is 21031030203137. The reversal of 21031030203122 is 22130203013012.

It is a junction number, because it is equal to n+sod(n) for n = 21031030203094 and 21031030203103.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75984848 + ... + 76261124.

It is an arithmetic number, because the mean of its divisors is an integer number (530072496360).

Almost surely, 2^{21031030203122} is an apocalyptic number.

21031030203122 is a deficient number, since it is larger than the sum of its proper divisors (12893609563918).

21031030203122 is a wasteful number, since it uses less digits than its factorization.

21031030203122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276915.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21031030203122 its reverse (22130203013012), we get a palindrome (43161233216134).

The spelling of 21031030203122 in words is "twenty-one trillion, thirty-one billion, thirty million, two hundred three thousand, one hundred twenty-two".