21211212120110 has 64 divisors (see below), whose sum is σ = 39560307621120. Its totient is φ = 8178740613120.

The previous prime is 21211212120083. The next prime is 21211212120167. The reversal of 21211212120110 is 1102121211212.

It is a super-2 number, since 2×21211212120110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 600679355 + ... + 600714665.

It is an arithmetic number, because the mean of its divisors is an integer number (618129806580).

Almost surely, 2^{21211212120110} is an apocalyptic number.

21211212120110 is a deficient number, since it is larger than the sum of its proper divisors (18349095501010).

21211212120110 is a wasteful number, since it uses less digits than its factorization.

21211212120110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38621.

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

Adding to 21211212120110 its reverse (1102121211212), we get a palindrome (22313333331322).

The spelling of 21211212120110 in words is "twenty-one trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred ten".