118121157 has 48 divisors (see below), whose sum is σ = 223941120. Its totient is φ = 58125600.

The previous prime is 118121149. The next prime is 118121173. The reversal of 118121157 is 751121811.

It is not a de Polignac number, because 118121157 - 2³ = 118121149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118121157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118121197) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8682 + ... + 17652.

It is an arithmetic number, because the mean of its divisors is an integer number (4665440).

Almost surely, 2^118121157 is an apocalyptic number.

It is an amenable number.

118121157 is a deficient number, since it is larger than the sum of its proper divisors (105819963).

118121157 is a wasteful number, since it uses less digits than its factorization.

118121157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9014 (or 9011 counting only the distinct ones).

The product of its digits is 560, while the sum is 27.

The square root of 118121157 is about 10868.3557634078. The cubic root of 118121157 is about 490.6546255361.

Adding to 118121157 its reverse (751121811), we get a palindrome (869242968).

The spelling of 118121157 in words is "one hundred eighteen million, one hundred twenty-one thousand, one hundred fifty-seven".