121296840723 has 24 divisors (see below), whose sum is σ = 179596525680. Its totient is φ = 78845034240.

The previous prime is 121296840647. The next prime is 121296840767. The reversal of 121296840723 is 327048692121.

121296840723 is a `hidden beast` number, since 1 + 212 + 9 + 6 + 8 + 407 + 23 = 666.

It is not a de Polignac number, because 121296840723 - 2⁹ = 121296840211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121296840323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55218 + ... + 495623.

It is an arithmetic number, because the mean of its divisors is an integer number (7483188570).

Almost surely, 2^121296840723 is an apocalyptic number.

121296840723 is a deficient number, since it is larger than the sum of its proper divisors (58299684957).

121296840723 is a wasteful number, since it uses less digits than its factorization.

121296840723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551459 (or 551456 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 121296840723 in words is "one hundred twenty-one billion, two hundred ninety-six million, eight hundred forty thousand, seven hundred twenty-three".