220121031300 has 72 divisors (see below), whose sum is σ = 642835793376. Its totient is φ = 58150344960.

The previous prime is 220121031287. The next prime is 220121031311. The reversal of 220121031300 is 3130121022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 220121031300.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3396577 + ... + 3460776.

It is an arithmetic number, because the mean of its divisors is an integer number (8928274908).

Almost surely, 2^220121031300 is an apocalyptic number.

220121031300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220121031300 is an abundant number, since it is smaller than the sum of its proper divisors (422714762076).

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

220121031300 is a wasteful number, since it uses less digits than its factorization.

220121031300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6857477 (or 6857470 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 220121031300 its reverse (3130121022), we get a palindrome (223251152322).

The spelling of 220121031300 in words is "two hundred twenty billion, one hundred twenty-one million, thirty-one thousand, three hundred".