2112202221021 has 6 divisors (see below), whose sum is σ = 3050958763710. Its totient is φ = 1408134814008.

The previous prime is 2112202221001. The next prime is 2112202221091. The reversal of 2112202221021 is 1201222022112.

It is a happy number.

2112202221021 is a `hidden beast` number, since 211 + 220 + 2 + 2 + 210 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2100583536921 + 11618684100 = 1449339^2 + 107790^2 .

It is not a de Polignac number, because 2112202221021 - 2⁹ = 2112202220509 is a prime.

It is a super-2 number, since 2×2112202221021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112202220985 and 2112202221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112202221001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117344567826 + ... + 117344567843.

It is an arithmetic number, because the mean of its divisors is an integer number (508493127285).

Almost surely, 2^{2112202221021} is an apocalyptic number.

It is an amenable number.

2112202221021 is a deficient number, since it is larger than the sum of its proper divisors (938756542689).

2112202221021 is a wasteful number, since it uses less digits than its factorization.

2112202221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234689135675 (or 234689135672 counting only the distinct ones).

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

Adding to 2112202221021 its reverse (1201222022112), we get a palindrome (3313424243133).

The spelling of 2112202221021 in words is "two trillion, one hundred twelve billion, two hundred two million, two hundred twenty-one thousand, twenty-one".