1220402291100 has 72 divisors (see below), whose sum is σ = 3531995687808. Its totient is φ = 325351665600.

The previous prime is 1220402291033. The next prime is 1220402291111. The reversal of 1220402291100 is 11922040221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 547227 + ... + 1655373.

It is an arithmetic number, because the mean of its divisors is an integer number (49055495664).

Almost surely, 2^{1220402291100} is an apocalyptic number.

1220402291100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220402291100 is an abundant number, since it is smaller than the sum of its proper divisors (2311593396708).

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

1220402291100 is a wasteful number, since it uses less digits than its factorization.

1220402291100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111835 (or 1111828 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 1220402291100 in words is "one trillion, two hundred twenty billion, four hundred two million, two hundred ninety-one thousand, one hundred".