220020131311 has 4 divisors (see below), whose sum is σ = 220021877232. Its totient is φ = 220018385392.

The previous prime is 220020131251. The next prime is 220020131437. The reversal of 220020131311 is 113131020022.

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 220020131311 - 2²³ = 220011742703 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 (220020135311) 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, 667870 + ... + 941323.

It is an arithmetic number, because the mean of its divisors is an integer number (55005469308).

Almost surely, 2^220020131311 is an apocalyptic number.

220020131311 is a deficient number, since it is larger than the sum of its proper divisors (1745921).

220020131311 is a wasteful number, since it uses less digits than its factorization.

220020131311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745920.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 220020131311 its reverse (113131020022), we get a palindrome (333151151333).

The spelling of 220020131311 in words is "two hundred twenty billion, twenty million, one hundred thirty-one thousand, three hundred eleven".