2112222210021 has 96 divisors (see below), whose sum is σ = 3936116486400. Its totient is φ = 1095807398400.

The previous prime is 2112222210001. The next prime is 2112222210031. The reversal of 2112222210021 is 1200122222112.

It is a happy number.

2112222210021 is a `hidden beast` number, since 211 + 2 + 222 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 2112222210021 - 2¹⁵ = 2112222177253 is a prime.

It is a super-2 number, since 2×2112222210021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112222209976 and 2112222210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112222210001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17342625 + ... + 17463993.

It is an arithmetic number, because the mean of its divisors is an integer number (41001213400).

Almost surely, 2^{2112222210021} is an apocalyptic number.

2112222210021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2112222210021 is a deficient number, since it is larger than the sum of its proper divisors (1823894276379).

2112222210021 is a wasteful number, since it uses less digits than its factorization.

2112222210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122168 (or 122151 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2112222210021 its reverse (1200122222112), we get a palindrome (3312344432133).

The spelling of 2112222210021 in words is "two trillion, one hundred twelve billion, two hundred twenty-two million, two hundred ten thousand, twenty-one".