220110111210021 has 16 divisors (see below), whose sum is σ = 297570939973440. Its totient is φ = 144695631208320.

The previous prime is 220110111210001. The next prime is 220110111210029. The reversal of 220110111210021 is 120012111011022.

It is a happy number.

It is not a de Polignac number, because 220110111210021 - 2²¹ = 220110109112869 is a prime.

It is a super-2 number, since 2×220110111210021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220110111210029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118188270 + ... + 120036191.

It is an arithmetic number, because the mean of its divisors is an integer number (18598183748340).

Almost surely, 2^{220110111210021} is an apocalyptic number.

It is an amenable number.

220110111210021 is a deficient number, since it is larger than the sum of its proper divisors (77460828763419).

220110111210021 is a wasteful number, since it uses less digits than its factorization.

220110111210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238228756.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 220110111210021 its reverse (120012111011022), we get a palindrome (340122222221043).

The spelling of 220110111210021 in words is "two hundred twenty trillion, one hundred ten billion, one hundred eleven million, two hundred ten thousand, twenty-one".