21012202022122 has 16 divisors (see below), whose sum is σ = 32605672815360. Its totient is φ = 10143656233648.

The previous prime is 21012202022107. The next prime is 21012202022177. The reversal of 21012202022122 is 22122020221012.

It is a self number, because there is not a number n which added to its sum of digits gives 21012202022122.

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, 670923 + ... + 6517249.

It is an arithmetic number, because the mean of its divisors is an integer number (2037854550960).

Almost surely, 2^{21012202022122} is an apocalyptic number.

21012202022122 is a deficient number, since it is larger than the sum of its proper divisors (11593470793238).

21012202022122 is a wasteful number, since it uses less digits than its factorization.

21012202022122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908325.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21012202022122 its reverse (22122020221012), we get a palindrome (43134222243134).

The spelling of 21012202022122 in words is "twenty-one trillion, twelve billion, two hundred two million, twenty-two thousand, one hundred twenty-two".