1220102900 has 36 divisors (see below), whose sum is σ = 2662290540. Its totient is φ = 485337600.

The previous prime is 1220102899. The next prime is 1220102921. The reversal of 1220102900 is 92010221.

It can be written as a sum of positive squares in 6 ways, for example, as 187251856 + 1032851044 = 13684^2 + 32138^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15605 + ... + 51804.

It is an arithmetic number, because the mean of its divisors is an integer number (73952515).

Almost surely, 2^1220102900 is an apocalyptic number.

1220102900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220102900 is an abundant number, since it is smaller than the sum of its proper divisors (1442187640).

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

1220102900 is a wasteful number, since it uses less digits than its factorization.

1220102900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67604 (or 67597 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1220102900 is about 34929.9713713023. The cubic root of 1220102900 is about 1068.5597707549.

The spelling of 1220102900 in words is "one billion, two hundred twenty million, one hundred two thousand, nine hundred".