120212202210021 has 12 divisors (see below), whose sum is σ = 173641034626540. Its totient is φ = 80140920298560.

The previous prime is 120212202210019. The next prime is 120212202210109. The reversal of 120212202210021 is 120012202212021.

It is a happy number.

120212202210021 is a `hidden beast` number, since 1 + 20 + 212 + 202 + 210 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21423114077121 + 98789088132900 = 4628511^2 + 9939270^2 .

It is not a de Polignac number, because 120212202210021 - 2¹ = 120212202210019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120212202209976 and 120212202210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120212202217021) 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 in 11 ways as a sum of consecutive naturals, for example, 44261506 + ... + 46898883.

Almost surely, 2^{120212202210021} is an apocalyptic number.

It is an amenable number.

120212202210021 is a deficient number, since it is larger than the sum of its proper divisors (53428832416519).

120212202210021 is a wasteful number, since it uses less digits than its factorization.

120212202210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91306916 (or 91306913 counting only the distinct ones).

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

Adding to 120212202210021 its reverse (120012202212021), we get a palindrome (240224404422042).

The spelling of 120212202210021 in words is "one hundred twenty trillion, two hundred twelve billion, two hundred two million, two hundred ten thousand, twenty-one".