21012022122 has 48 divisors (see below), whose sum is σ = 52645515552. Its totient is φ = 5541631200.

The previous prime is 21012022103. The next prime is 21012022139. The reversal of 21012022122 is 22122021012.

21012022122 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2745004 + ... + 2752647.

It is an arithmetic number, because the mean of its divisors is an integer number (1096781574).

Almost surely, 2^21012022122 is an apocalyptic number.

21012022122 is an abundant number, since it is smaller than the sum of its proper divisors (31633493430).

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

21012022122 is a wasteful number, since it uses less digits than its factorization.

21012022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497683 (or 5497676 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21012022122 its reverse (22122021012), we get a palindrome (43134043134).

The spelling of 21012022122 in words is "twenty-one billion, twelve million, twenty-two thousand, one hundred twenty-two".