220120210110021 has 32 divisors (see below), whose sum is σ = 330533911545600. Its totient is φ = 129285565668864.

The previous prime is 220120210109983. The next prime is 220120210110131. The reversal of 220120210110021 is 120011012021022.

It is not a de Polignac number, because 220120210110021 - 2²⁵ = 220120176555589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120210112021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268075846 + ... + 268895703.

It is an arithmetic number, because the mean of its divisors is an integer number (10329184735800).

Almost surely, 2^{220120210110021} is an apocalyptic number.

It is an amenable number.

220120210110021 is a deficient number, since it is larger than the sum of its proper divisors (110413701435579).

220120210110021 is a wasteful number, since it uses less digits than its factorization.

220120210110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536972045.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 220120210110021 its reverse (120011012021022), we get a palindrome (340131222131043).

The spelling of 220120210110021 in words is "two hundred twenty trillion, one hundred twenty billion, two hundred ten million, one hundred ten thousand, twenty-one".