2101577861100 has 72 divisors (see below), whose sum is σ = 6107118164560. Its totient is φ = 557973492480.

The previous prime is 2101577861083. The next prime is 2101577861113. The reversal of 2101577861100 is 11687751012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15226627 + ... + 15364026.

Almost surely, 2^{2101577861100} is an apocalyptic number.

2101577861100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101577861100 is an abundant number, since it is smaller than the sum of its proper divisors (4005540303460).

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

2101577861100 is a wasteful number, since it uses less digits than its factorization.

2101577861100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30590899 (or 30590892 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 39.

The spelling of 2101577861100 in words is "two trillion, one hundred one billion, five hundred seventy-seven million, eight hundred sixty-one thousand, one hundred".