212220000112021 has 32 divisors (see below), whose sum is σ = 234096939374976. Its totient is φ = 190778622240000.

The previous prime is 212220000111989. The next prime is 212220000112027. The reversal of 212220000112021 is 120211000022212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212220000112021 - 2⁵ = 212220000111989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212220000111986 and 212220000112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220000112027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5606405931 + ... + 5606443783.

It is an arithmetic number, because the mean of its divisors is an integer number (7315529355468).

Almost surely, 2^{212220000112021} is an apocalyptic number.

It is an amenable number.

212220000112021 is a deficient number, since it is larger than the sum of its proper divisors (21876939262955).

212220000112021 is a wasteful number, since it uses less digits than its factorization.

212220000112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44133.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212220000112021 its reverse (120211000022212), we get a palindrome (332431000134233).

The spelling of 212220000112021 in words is "two hundred twelve trillion, two hundred twenty billion, one hundred twelve thousand, twenty-one".