121738992 has 40 divisors (see below), whose sum is σ = 316396416. Its totient is φ = 40334016.

The previous prime is 121738987. The next prime is 121738993. The reversal of 121738992 is 299837121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121738993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423 + ... + 15609.

Almost surely, 2^121738992 is an apocalyptic number.

121738992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121738992 is an abundant number, since it is smaller than the sum of its proper divisors (194657424).

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

121738992 is a wasteful number, since it uses less digits than its factorization.

121738992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15365 (or 15359 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 121738992 is about 11033.5394139868. The cubic root of 121738992 is about 495.6136212229.

The spelling of 121738992 in words is "one hundred twenty-one million, seven hundred thirty-eight thousand, nine hundred ninety-two".