21210111120122 has 8 divisors (see below), whose sum is σ = 31815432336576. Its totient is φ = 10604967007932.

The previous prime is 21210111120061. The next prime is 21210111120173. The reversal of 21210111120122 is 22102111101212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21210111120122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43976258 + ... + 44455949.

It is an arithmetic number, because the mean of its divisors is an integer number (3976929042072).

Almost surely, 2^{21210111120122} is an apocalyptic number.

21210111120122 is a deficient number, since it is larger than the sum of its proper divisors (10605321216454).

21210111120122 is a wasteful number, since it uses less digits than its factorization.

21210111120122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88552132.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21210111120122 its reverse (22102111101212), we get a palindrome (43312222221334).

The spelling of 21210111120122 in words is "twenty-one trillion, two hundred ten billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty-two".