220131321220 has 24 divisors (see below), whose sum is σ = 462285773208. Its totient is φ = 88050624000.

The previous prime is 220131321203. The next prime is 220131321239. The reversal of 220131321220 is 22123131022.

It can be written as a sum of positive squares in 4 ways, for example, as 9075610756 + 211055710464 = 95266^2 + 459408^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168390 + ... + 1343650.

It is an arithmetic number, because the mean of its divisors is an integer number (19261907217).

Almost surely, 2^220131321220 is an apocalyptic number.

220131321220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220131321220 is an abundant number, since it is smaller than the sum of its proper divisors (242154451988).

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

220131321220 is a wasteful number, since it uses less digits than its factorization.

220131321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238071 (or 238069 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 220131321220 its reverse (22123131022), we get a palindrome (242254452242).

The spelling of 220131321220 in words is "two hundred twenty billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred twenty".