101920901820 has 48 divisors (see below), whose sum is σ = 285900332928. Its totient is φ = 27129211200.

The previous prime is 101920901813. The next prime is 101920901917. The reversal of 101920901820 is 28109029101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1519906 + ... + 1585545.

It is an arithmetic number, because the mean of its divisors is an integer number (5956256936).

Almost surely, 2^101920901820 is an apocalyptic number.

101920901820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101920901820 is an abundant number, since it is smaller than the sum of its proper divisors (183979431108).

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

101920901820 is a wasteful number, since it uses less digits than its factorization.

101920901820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106010 (or 3106008 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 101920901820 in words is "one hundred one billion, nine hundred twenty million, nine hundred one thousand, eight hundred twenty".