20112212111121 has 24 divisors (see below), whose sum is σ = 31433936608256. Its totient is φ = 12318088335840.

The previous prime is 20112212111111. The next prime is 20112212111149. The reversal of 20112212111121 is 12111121221102.

It is a happy number.

20112212111121 is a `hidden beast` number, since 201 + 1 + 221 + 211 + 11 + 21 = 666.

It is not a de Polignac number, because 20112212111121 - 2³⁰ = 20111138369297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20112212111094 and 20112212111103.

It is not an unprimeable number, because it can be changed into a prime (20112212111111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407319505 + ... + 407368878.

Almost surely, 2^{20112212111121} is an apocalyptic number.

It is an amenable number.

20112212111121 is a deficient number, since it is larger than the sum of its proper divisors (11321724497135).

20112212111121 is a wasteful number, since it uses less digits than its factorization.

20112212111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814688613 (or 814688610 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 20112212111121 its reverse (12111121221102), we get a palindrome (32223333332223).

The spelling of 20112212111121 in words is "twenty trillion, one hundred twelve billion, two hundred twelve million, one hundred eleven thousand, one hundred twenty-one".