220120111021 has 4 divisors (see below), whose sum is σ = 221800417344. Its totient is φ = 218439804700.

The previous prime is 220120111009. The next prime is 220120111039. The reversal of 220120111021 is 120111021022.

220120111021 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220120111021 - 2²⁹ = 219583240109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220120110992 and 220120111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220120111061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840152965 + ... + 840153226.

It is an arithmetic number, because the mean of its divisors is an integer number (55450104336).

Almost surely, 2^220120111021 is an apocalyptic number.

It is an amenable number.

220120111021 is a deficient number, since it is larger than the sum of its proper divisors (1680306323).

220120111021 is a wasteful number, since it uses less digits than its factorization.

220120111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680306322.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220120111021 its reverse (120111021022), we get a palindrome (340231132043).

The spelling of 220120111021 in words is "two hundred twenty billion, one hundred twenty million, one hundred eleven thousand, twenty-one".