121221100992 has 56 divisors (see below), whose sum is σ = 320756580736. Its totient is φ = 40403789568.

The previous prime is 121221100969. The next prime is 121221101003. The reversal of 121221100992 is 299001122121.

It is a congruent number.

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, 4214853 + ... + 4243515.

Almost surely, 2^121221100992 is an apocalyptic number.

121221100992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121221100992 is an abundant number, since it is smaller than the sum of its proper divisors (199535479744).

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

121221100992 is a wasteful number, since it uses less digits than its factorization.

121221100992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50705 (or 50695 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 121221100992 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, nine hundred ninety-two".