220012012720 has 40 divisors (see below), whose sum is σ = 511575449040. Its totient is φ = 87996629760.

The previous prime is 220012012711. The next prime is 220012012721. The reversal of 220012012720 is 27210210022.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×220012012720² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (220012012721) 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, 778771 + ... + 1022989.

It is an arithmetic number, because the mean of its divisors is an integer number (12789386226).

Almost surely, 2^220012012720 is an apocalyptic number.

220012012720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220012012720 is an abundant number, since it is smaller than the sum of its proper divisors (291563436320).

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

220012012720 is a wasteful number, since it uses less digits than its factorization.

220012012720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255493 (or 255487 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

Adding to 220012012720 its reverse (27210210022), we get a palindrome (247222222742).

The spelling of 220012012720 in words is "two hundred twenty billion, twelve million, twelve thousand, seven hundred twenty".