220112001121021 has 4 divisors (see below), whose sum is σ = 220132417790844. Its totient is φ = 220091584451200.

The previous prime is 220112001120971. The next prime is 220112001121081. The reversal of 220112001121021 is 120121100211022.

220112001121021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88188721083225 + 131923280037796 = 9390885^2 + 11485786^2 .

It is a cyclic number.

It is not a de Polignac number, because 220112001121021 - 2²⁹ = 220111464250109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220112001120986 and 220112001121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220112001121081) 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, 10208318740 + ... + 10208340301.

It is an arithmetic number, because the mean of its divisors is an integer number (55033104447711).

Almost surely, 2^{220112001121021} is an apocalyptic number.

It is an amenable number.

220112001121021 is a deficient number, since it is larger than the sum of its proper divisors (20416669823).

220112001121021 is a wasteful number, since it uses less digits than its factorization.

220112001121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20416669822.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 220112001121021 its reverse (120121100211022), we get a palindrome (340233101332043).

Subtracting from 220112001121021 its reverse (120121100211022), we obtain a palindrome (99990900909999).

The spelling of 220112001121021 in words is "two hundred twenty trillion, one hundred twelve billion, one million, one hundred twenty-one thousand, twenty-one".