101211121992 has 32 divisors (see below), whose sum is σ = 253599000480. Its totient is φ = 33660881280.

The previous prime is 101211121961. The next prime is 101211122053. The reversal of 101211121992 is 299121112101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4749109 + ... + 4770372.

It is an arithmetic number, because the mean of its divisors is an integer number (7924968765).

Almost surely, 2^101211121992 is an apocalyptic number.

101211121992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

101211121992 is an abundant number, since it is smaller than the sum of its proper divisors (152387878488).

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

101211121992 is a wasteful number, since it uses less digits than its factorization.

101211121992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9519933 (or 9519929 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 30.

The spelling of 101211121992 in words is "one hundred one billion, two hundred eleven million, one hundred twenty-one thousand, nine hundred ninety-two".