121408731492 has 12 divisors (see below), whose sum is σ = 283287040176. Its totient is φ = 40469577160.

The previous prime is 121408731487. The next prime is 121408731511. The reversal of 121408731492 is 294137804121.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5058697134 + ... + 5058697157.

It is an arithmetic number, because the mean of its divisors is an integer number (23607253348).

Almost surely, 2^121408731492 is an apocalyptic number.

121408731492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121408731492 is an abundant number, since it is smaller than the sum of its proper divisors (161878308684).

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

121408731492 is a wasteful number, since it uses less digits than its factorization.

121408731492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10117394298 (or 10117394296 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 121408731492 in words is "one hundred twenty-one billion, four hundred eight million, seven hundred thirty-one thousand, four hundred ninety-two".