118797901921 has 4 divisors (see below), whose sum is σ = 118809745600. Its totient is φ = 118786058244.

The previous prime is 118797901919. The next prime is 118797901949. The reversal of 118797901921 is 129109797811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 129109797811 = 2539 ⋅50850649.

It is a cyclic number.

It is not a de Polignac number, because 118797901921 - 2¹ = 118797901919 is a prime.

It is a super-2 number, since 2×118797901921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118797904921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5906781 + ... + 5926858.

It is an arithmetic number, because the mean of its divisors is an integer number (29702436400).

Almost surely, 2^118797901921 is an apocalyptic number.

It is an amenable number.

118797901921 is a deficient number, since it is larger than the sum of its proper divisors (11843679).

118797901921 is a wasteful number, since it uses less digits than its factorization.

118797901921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11843678.

The product of its (nonzero) digits is 571536, while the sum is 55.

The spelling of 118797901921 in words is "one hundred eighteen billion, seven hundred ninety-seven million, nine hundred one thousand, nine hundred twenty-one".