1220125200 has 120 divisors (see below), whose sum is σ = 4466851008. Its totient is φ = 278883840.

The previous prime is 1220125199. The next prime is 1220125279. The reversal of 1220125200 is 25210221.

It is a tau number, because it is divible by the number of its divisors (120).

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 1220125200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64227 + ... + 81026.

Almost surely, 2^1220125200 is an apocalyptic number.

1220125200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220125200 is an abundant number, since it is smaller than the sum of its proper divisors (3246725808).

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

1220125200 is a wasteful number, since it uses less digits than its factorization.

1220125200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145281 (or 145270 counting only the distinct ones).

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

The square root of 1220125200 is about 34930.2905799537. The cubic root of 1220125200 is about 1068.5662807899.

Adding to 1220125200 its reverse (25210221), we get a palindrome (1245335421).

It can be divided in two parts, 12201 and 25200, that added together give a triangular number (37401 = T₂₇₃).

The spelling of 1220125200 in words is "one billion, two hundred twenty million, one hundred twenty-five thousand, two hundred".