21030031122 has 16 divisors (see below), whose sum is σ = 42064401792. Its totient is φ = 7009287120.

The previous prime is 21030031097. The next prime is 21030031153. The reversal of 21030031122 is 22113003012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116029 + ... + 235632.

It is an arithmetic number, because the mean of its divisors is an integer number (2629025112).

Almost surely, 2^21030031122 is an apocalyptic number.

21030031122 is an abundant number, since it is smaller than the sum of its proper divisors (21034370670).

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

21030031122 is a wasteful number, since it uses less digits than its factorization.

21030031122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361633.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21030031122 its reverse (22113003012), we get a palindrome (43143034134).

The spelling of 21030031122 in words is "twenty-one billion, thirty million, thirty-one thousand, one hundred twenty-two".