21013012313122 has 32 divisors (see below), whose sum is σ = 33470859502080. Its totient is φ = 9880008347520.

The previous prime is 21013012313077. The next prime is 21013012313141. The reversal of 21013012313122 is 22131321031012.

It is a junction number, because it is equal to n+sod(n) for n = 21013012313093 and 21013012313102.

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 15 ways as a sum of consecutive naturals, for example, 32039122 + ... + 32688397.

It is an arithmetic number, because the mean of its divisors is an integer number (1045964359440).

Almost surely, 2^{21013012313122} is an apocalyptic number.

21013012313122 is a deficient number, since it is larger than the sum of its proper divisors (12457847188958).

21013012313122 is a wasteful number, since it uses less digits than its factorization.

21013012313122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64727706.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21013012313122 its reverse (22131321031012), we get a palindrome (43144333344134).

The spelling of 21013012313122 in words is "twenty-one trillion, thirteen billion, twelve million, three hundred thirteen thousand, one hundred twenty-two".