220020121213231 has 4 divisors (see below), whose sum is σ = 220021295787000. Its totient is φ = 220018946639464.

The previous prime is 220020121213229. The next prime is 220020121213247. The reversal of 220020121213231 is 132312121020022.

220020121213231 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 is a cyclic number.

It is not a de Polignac number, because 220020121213231 - 2¹ = 220020121213229 is a prime.

It is a super-2 number, since 2×220020121213231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020121213201) 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, 587005861 + ... + 587380558.

It is an arithmetic number, because the mean of its divisors is an integer number (55005323946750).

Almost surely, 2^{220020121213231} is an apocalyptic number.

220020121213231 is a deficient number, since it is larger than the sum of its proper divisors (1174573769).

220020121213231 is a wasteful number, since it uses less digits than its factorization.

220020121213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174573768.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 220020121213231 its reverse (132312121020022), we get a palindrome (352332242233253).

The spelling of 220020121213231 in words is "two hundred twenty trillion, twenty billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred thirty-one".