202210120120021 has 6 divisors (see below), whose sum is σ = 218961254331330. Its totient is φ = 186655495495248.

The previous prime is 202210120119991. The next prime is 202210120120037. The reversal of 202210120120021 is 120021021012202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 27031368688900 + 175178751431121 = 5199170^2 + 13235511^2 .

It is not a de Polignac number, because 202210120120021 - 2¹⁷ = 202210119988949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202210120119977 and 202210120120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202210120120061) 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, 598254793086 + ... + 598254793423.

It is an arithmetic number, because the mean of its divisors is an integer number (36493542388555).

Almost surely, 2^{202210120120021} is an apocalyptic number.

It is an amenable number.

202210120120021 is a deficient number, since it is larger than the sum of its proper divisors (16751134211309).

202210120120021 is a wasteful number, since it uses less digits than its factorization.

202210120120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196509586535 (or 1196509586522 counting only the distinct ones).

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

Adding to 202210120120021 its reverse (120021021012202), we get a palindrome (322231141132223).

The spelling of 202210120120021 in words is "two hundred two trillion, two hundred ten billion, one hundred twenty million, one hundred twenty thousand, twenty-one".