121221101080 has 16 divisors (see below), whose sum is σ = 272747477520. Its totient is φ = 48488440416.

The previous prime is 121221101059. The next prime is 121221101083. The reversal of 121221101080 is 80101122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221101083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515263724 + ... + 1515263803.

It is an arithmetic number, because the mean of its divisors is an integer number (17046717345).

Almost surely, 2^121221101080 is an apocalyptic number.

121221101080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121221101080 is an abundant number, since it is smaller than the sum of its proper divisors (151526376440).

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

121221101080 is a wasteful number, since it uses less digits than its factorization.

121221101080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030527538 (or 3030527534 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

The spelling of 121221101080 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, eighty".