220111121021021 has 16 divisors (see below), whose sum is σ = 221218290191808. Its totient is φ = 219005364758400.

The previous prime is 220111121020871. The next prime is 220111121021039. The reversal of 220111121021021 is 120120121111022.

220111121021021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220111121021021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220111121021221) 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, 7400917211 + ... + 7400946951.

It is an arithmetic number, because the mean of its divisors is an integer number (13826143136988).

Almost surely, 2^{220111121021021} is an apocalyptic number.

It is an amenable number.

220111121021021 is a deficient number, since it is larger than the sum of its proper divisors (1107169170787).

220111121021021 is a wasteful number, since it uses less digits than its factorization.

220111121021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52252.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 220111121021021 its reverse (120120121111022), we get a palindrome (340231242132043).

Subtracting from 220111121021021 its reverse (120120121111022), we obtain a palindrome (99990999909999).

The spelling of 220111121021021 in words is "two hundred twenty trillion, one hundred eleven billion, one hundred twenty-one million, twenty-one thousand, twenty-one".