121973564323 has 12 divisors (see below), whose sum is σ = 133028109480. Its totient is φ = 111780953856.

The previous prime is 121973564309. The next prime is 121973564347. The reversal of 121973564323 is 323465379121.

It is not a de Polignac number, because 121973564323 - 2⁵ = 121973564291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121973564423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2572686 + ... + 2619667.

It is an arithmetic number, because the mean of its divisors is an integer number (11085675790).

Almost surely, 2^121973564323 is an apocalyptic number.

121973564323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121973564323 is a deficient number, since it is larger than the sum of its proper divisors (11054545157).

121973564323 is a wasteful number, since it uses less digits than its factorization.

121973564323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192518 (or 5192505 counting only the distinct ones).

The product of its digits is 816480, while the sum is 46.

The spelling of 121973564323 in words is "one hundred twenty-one billion, nine hundred seventy-three million, five hundred sixty-four thousand, three hundred twenty-three".