121727796390 has 48 divisors (see below), whose sum is σ = 317572517808. Its totient is φ = 32349951168.

The previous prime is 121727796371. The next prime is 121727796419. The reversal of 121727796390 is 93697727121.

121727796390 is a `hidden beast` number, since 12 + 172 + 7 + 79 + 6 + 390 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2281704 + ... + 2334443.

It is an arithmetic number, because the mean of its divisors is an integer number (6616094121).

Almost surely, 2^121727796390 is an apocalyptic number.

121727796390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121727796390 is an abundant number, since it is smaller than the sum of its proper divisors (195844721418).

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

121727796390 is a wasteful number, since it uses less digits than its factorization.

121727796390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616453 (or 4616450 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The spelling of 121727796390 in words is "one hundred twenty-one billion, seven hundred twenty-seven million, seven hundred ninety-six thousand, three hundred ninety".