118211961 has 24 divisors (see below), whose sum is σ = 186369024. Its totient is φ = 66437280.

The previous prime is 118211953. The next prime is 118211969. The reversal of 118211961 is 169112811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (118211953) and next prime (118211969).

It is not a de Polignac number, because 118211961 - 2³ = 118211953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118211969) 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, 2376 + ... + 15558.

It is an arithmetic number, because the mean of its divisors is an integer number (7765376).

Almost surely, 2^118211961 is an apocalyptic number.

It is an amenable number.

118211961 is a deficient number, since it is larger than the sum of its proper divisors (68157063).

118211961 is a wasteful number, since it uses less digits than its factorization.

118211961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13261 (or 13254 counting only the distinct ones).

The product of its digits is 864, while the sum is 30.

The square root of 118211961 is about 10872.5324097011. The cubic root of 118211961 is about 490.7803213104.

The spelling of 118211961 in words is "one hundred eighteen million, two hundred eleven thousand, nine hundred sixty-one".