121102111992 has 64 divisors (see below), whose sum is σ = 319052563200. Its totient is φ = 38199237120.

The previous prime is 121102111987. The next prime is 121102112023. The reversal of 121102111992 is 299111201121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251013 + ... + 552459.

It is an arithmetic number, because the mean of its divisors is an integer number (4985196300).

Almost surely, 2^121102111992 is an apocalyptic number.

121102111992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121102111992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159526281600).

121102111992 is an abundant number, since it is smaller than the sum of its proper divisors (197950451208).

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

121102111992 is a wasteful number, since it uses less digits than its factorization.

121102111992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302356 (or 302352 counting only the distinct ones).

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

The spelling of 121102111992 in words is "one hundred twenty-one billion, one hundred two million, one hundred eleven thousand, nine hundred ninety-two".