20112121211210 has 24 divisors (see below), whose sum is σ = 42112319108580. Its totient is φ = 6895584415104.

The previous prime is 20112121211167. The next prime is 20112121211333. The reversal of 20112121211210 is 1211212121102.

It can be written as a sum of positive squares in 2 ways, for example, as 19109461444969 + 1002659766241 = 4371437^2 + 1001329^2 .

It is a super-2 number, since 2×20112121211210² (a number of 27 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 20522572175 + ... + 20522573154.

Almost surely, 2^{20112121211210} is an apocalyptic number.

20112121211210 is an abundant number, since it is smaller than the sum of its proper divisors (22000197897370).

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

20112121211210 is a wasteful number, since it uses less digits than its factorization.

20112121211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41045145350 (or 41045145343 counting only the distinct ones).

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

Adding to 20112121211210 its reverse (1211212121102), we get a palindrome (21323333332312).

The spelling of 20112121211210 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, two hundred ten".