101909191092 has 24 divisors (see below), whose sum is σ = 240142453152. Its totient is φ = 33633396000.

The previous prime is 101909191051. The next prime is 101909191093. The reversal of 101909191092 is 290191909101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101909191093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42040534 + ... + 42042957.

It is an arithmetic number, because the mean of its divisors is an integer number (10005935548).

Almost surely, 2^101909191092 is an apocalyptic number.

101909191092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101909191092 is an abundant number, since it is smaller than the sum of its proper divisors (138233262060).

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

101909191092 is a wasteful number, since it uses less digits than its factorization.

101909191092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84083599 (or 84083597 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 42.

The spelling of 101909191092 in words is "one hundred one billion, nine hundred nine million, one hundred ninety-one thousand, ninety-two".