2112222221021 has 16 divisors (see below), whose sum is σ = 2312099665920. Its totient is φ = 1913664205680.

The previous prime is 2112222220991. The next prime is 2112222221041. The reversal of 2112222221021 is 1201222222112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2112222221021 is a prime.

It is a super-2 number, since 2×2112222221021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112222220984 and 2112222221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112222221041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4036760 + ... + 4529886.

It is an arithmetic number, because the mean of its divisors is an integer number (144506229120).

Almost surely, 2^{2112222221021} is an apocalyptic number.

It is an amenable number.

2112222221021 is a deficient number, since it is larger than the sum of its proper divisors (199877444899).

2112222221021 is a wasteful number, since it uses less digits than its factorization.

2112222221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494464.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2112222221021 its reverse (1201222222112), we get a palindrome (3313444443133).

The spelling of 2112222221021 in words is "two trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-one".