220112120122021 has 4 divisors (see below), whose sum is σ = 220112150654700. Its totient is φ = 220112089589344.

The previous prime is 220112120121997. The next prime is 220112120122033. The reversal of 220112120122021 is 120221021211022.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 201135903053121 + 18976217068900 = 14182239^2 + 4356170^2 .

It is a cyclic number.

It is not a de Polignac number, because 220112120122021 - 2⁵ = 220112120121989 is a prime.

It is a super-2 number, since 2×220112120122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220112120122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220112120122051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2235465 + ... + 21100273.

It is an arithmetic number, because the mean of its divisors is an integer number (55028037663675).

Almost surely, 2^{220112120122021} is an apocalyptic number.

It is an amenable number.

220112120122021 is a deficient number, since it is larger than the sum of its proper divisors (30532679).

220112120122021 is a wasteful number, since it uses less digits than its factorization.

220112120122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30532678.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 220112120122021 its reverse (120221021211022), we get a palindrome (340333141333043).

The spelling of 220112120122021 in words is "two hundred twenty trillion, one hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, twenty-one".