2112221111021 has 8 divisors (see below), whose sum is σ = 2541017878080. Its totient is φ = 1715187067488.

The previous prime is 2112221110943. The next prime is 2112221111027. The reversal of 2112221111021 is 1201111222112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2112221111021 - 2²⁶ = 2112154002157 is a prime.

It is a super-2 number, since 2×2112221111021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112221111027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7940680736 + ... + 7940681001.

It is an arithmetic number, because the mean of its divisors is an integer number (317627234760).

Almost surely, 2^{2112221111021} is an apocalyptic number.

It is an amenable number.

2112221111021 is a deficient number, since it is larger than the sum of its proper divisors (428796767059).

2112221111021 is a wasteful number, since it uses less digits than its factorization.

2112221111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15881361763.

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

Adding to 2112221111021 its reverse (1201111222112), we get a palindrome (3313332333133).

The spelling of 2112221111021 in words is "two trillion, one hundred twelve billion, two hundred twenty-one million, one hundred eleven thousand, twenty-one".