321133130220 has 48 divisors (see below), whose sum is σ = 1027626018048. Its totient is φ = 73401858240.

The previous prime is 321133130179. The next prime is 321133130273. The reversal of 321133130220 is 22031331123.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382300926 + ... + 382301765.

It is an arithmetic number, because the mean of its divisors is an integer number (21408875376).

Almost surely, 2^321133130220 is an apocalyptic number.

321133130220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321133130220 is an abundant number, since it is smaller than the sum of its proper divisors (706492887828).

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

321133130220 is a wasteful number, since it uses less digits than its factorization.

321133130220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764602710 (or 764602708 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 321133130220 its reverse (22031331123), we get a palindrome (343164461343).

The spelling of 321133130220 in words is "three hundred twenty-one billion, one hundred thirty-three million, one hundred thirty thousand, two hundred twenty".