20121110211210 has 64 divisors (see below), whose sum is σ = 50868615168000. Its totient is φ = 5079594169152.

The previous prime is 20121110211179. The next prime is 20121110211247. The reversal of 20121110211210 is 1211201112102.

It is a happy number.

It is a super-2 number, since 2×20121110211210² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20121110211210.

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, 11818794 + ... + 13413653.

It is an arithmetic number, because the mean of its divisors is an integer number (794822112000).

Almost surely, 2^{20121110211210} is an apocalyptic number.

20121110211210 is an abundant number, since it is smaller than the sum of its proper divisors (30747504956790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121110211210 is a wasteful number, since it uses less digits than its factorization.

20121110211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25233875.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20121110211210 its reverse (1211201112102), we get a palindrome (21332311323312).

The spelling of 20121110211210 in words is "twenty trillion, one hundred twenty-one billion, one hundred ten million, two hundred eleven thousand, two hundred ten".