121373013806 has 16 divisors (see below), whose sum is σ = 198626238720. Its totient is φ = 55165148280.

The previous prime is 121373013733. The next prime is 121373013877. The reversal of 121373013806 is 608310373121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70235 + ... + 497673.

It is an arithmetic number, because the mean of its divisors is an integer number (12414139920).

Almost surely, 2^121373013806 is an apocalyptic number.

121373013806 is a deficient number, since it is larger than the sum of its proper divisors (77253224914).

121373013806 is a wasteful number, since it uses less digits than its factorization.

121373013806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440359.

The product of its (nonzero) digits is 18144, while the sum is 35.

Adding to 121373013806 its reverse (608310373121), we get a palindrome (729683386927).

The spelling of 121373013806 in words is "one hundred twenty-one billion, three hundred seventy-three million, thirteen thousand, eight hundred six".