20120501220 has 24 divisors (see below), whose sum is σ = 56337403584. Its totient is φ = 5365466976.

The previous prime is 20120501209. The next prime is 20120501227. The reversal of 20120501220 is 2210502102.

It is a super-3 number, since 3×20120501220³ (a number of 32 digits) contains 333 as substring.

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 20120501220.

It is not an unprimeable number, because it can be changed into a prime (20120501227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167670784 + ... + 167670903.

It is an arithmetic number, because the mean of its divisors is an integer number (2347391816).

Almost surely, 2^20120501220 is an apocalyptic number.

20120501220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120501220 is an abundant number, since it is smaller than the sum of its proper divisors (36216902364).

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

20120501220 is a wasteful number, since it uses less digits than its factorization.

20120501220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335341699 (or 335341697 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The spelling of 20120501220 in words is "twenty billion, one hundred twenty million, five hundred one thousand, two hundred twenty".