220661131020 has 48 divisors (see below), whose sum is σ = 674019456768. Its totient is φ = 53493607360.

The previous prime is 220661130961. The next prime is 220661131021. The reversal of 220661131020 is 20131166022.

It is not an unprimeable number, because it can be changed into a prime (220661131021) 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, 167166864 + ... + 167168183.

It is an arithmetic number, because the mean of its divisors is an integer number (14042072016).

Almost surely, 2^220661131020 is an apocalyptic number.

220661131020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220661131020 is an abundant number, since it is smaller than the sum of its proper divisors (453358325748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220661131020 is a wasteful number, since it uses less digits than its factorization.

220661131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334335070 (or 334335068 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 220661131020 its reverse (20131166022), we get a palindrome (240792297042).

The spelling of 220661131020 in words is "two hundred twenty billion, six hundred sixty-one million, one hundred thirty-one thousand, twenty".