21000122120110 has 32 divisors (see below), whose sum is σ = 43204746543552. Its totient is φ = 7199292648960.

The previous prime is 21000122120099. The next prime is 21000122120123. The reversal of 21000122120110 is 1102122100012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14931051 + ... + 16276870.

It is an arithmetic number, because the mean of its divisors is an integer number (1350148329486).

Almost surely, 2^{21000122120110} is an apocalyptic number.

21000122120110 is an abundant number, since it is smaller than the sum of its proper divisors (22204624423442).

21000122120110 is a wasteful number, since it uses less digits than its factorization.

21000122120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31217548.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21000122120110 its reverse (1102122100012), we get a palindrome (22102244220122).

The spelling of 21000122120110 in words is "twenty-one trillion, one hundred twenty-two million, one hundred twenty thousand, one hundred ten".