1220112550420 has 24 divisors (see below), whose sum is σ = 2591025532200. Its totient is φ = 482561367552.

The previous prime is 1220112550417. The next prime is 1220112550441. The reversal of 1220112550420 is 240552110221.

It can be written as a sum of positive squares in 4 ways, for example, as 33446557456 + 1186665992964 = 182884^2 + 1089342^2 .

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, 342726465 + ... + 342730024.

It is an arithmetic number, because the mean of its divisors is an integer number (107959397175).

Almost surely, 2^{1220112550420} is an apocalyptic number.

1220112550420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220112550420 is an abundant number, since it is smaller than the sum of its proper divisors (1370912981780).

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

1220112550420 is a wasteful number, since it uses less digits than its factorization.

1220112550420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685456587 (or 685456585 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 1220112550420 its reverse (240552110221), we get a palindrome (1460664660641).

The spelling of 1220112550420 in words is "one trillion, two hundred twenty billion, one hundred twelve million, five hundred fifty thousand, four hundred twenty".