32121200220 has 24 divisors (see below), whose sum is σ = 89939360784. Its totient is φ = 8565653376.

The previous prime is 32121200207. The next prime is 32121200249. The reversal of 32121200220 is 2200212123.

It is a happy number.

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 32121200220.

It is a congruent number.

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, 267676609 + ... + 267676728.

It is an arithmetic number, because the mean of its divisors is an integer number (3747473366).

Almost surely, 2^32121200220 is an apocalyptic number.

32121200220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

32121200220 is an abundant number, since it is smaller than the sum of its proper divisors (57818160564).

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

32121200220 is a wasteful number, since it uses less digits than its factorization.

32121200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535353349 (or 535353347 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 32121200220 its reverse (2200212123), we get a palindrome (34321412343).

The spelling of 32121200220 in words is "thirty-two billion, one hundred twenty-one million, two hundred thousand, two hundred twenty".