2112222010021 has 2 divisors, whose sum is σ = 2112222010022. Its totient is φ = 2112222010020.

The previous prime is 2112222010007. The next prime is 2112222010033. The reversal of 2112222010021 is 1200102222112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2013475860900 + 98746149121 = 1418970^2 + 314239^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112222010021 - 2²⁵ = 2112188455589 is a prime.

It is a super-2 number, since 2×2112222010021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112222009977 and 2112222010004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112222010091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056111005010 + 1056111005011.

It is an arithmetic number, because the mean of its divisors is an integer number (1056111005011).

Almost surely, 2^{2112222010021} is an apocalyptic number.

It is an amenable number.

2112222010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112222010021 is an equidigital number, since it uses as much as digits as its factorization.

2112222010021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2112222010021 its reverse (1200102222112), we get a palindrome (3312324232133).

The spelling of 2112222010021 in words is "two trillion, one hundred twelve billion, two hundred twenty-two million, ten thousand, twenty-one".