118122021 has 6 divisors (see below), whose sum is σ = 170620710. Its totient is φ = 78748008.

The previous prime is 118122007. The next prime is 118122023. The reversal of 118122021 is 120221811.

It can be written as a sum of positive squares in only one way, i.e., 80299521 + 37822500 = 8961^2 + 6150^2 .

It is not a de Polignac number, because 118122021 - 2⁷ = 118121893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 118121985 and 118122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118122023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6562326 + ... + 6562343.

It is an arithmetic number, because the mean of its divisors is an integer number (28436785).

Almost surely, 2^118122021 is an apocalyptic number.

It is an amenable number.

118122021 is a deficient number, since it is larger than the sum of its proper divisors (52498689).

118122021 is a wasteful number, since it uses less digits than its factorization.

118122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13124675 (or 13124672 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 118122021 is about 10868.3955117579. The cubic root of 118122021 is about 490.6558218348.

Adding to 118122021 its reverse (120221811), we get a palindrome (238343832).

The spelling of 118122021 in words is "one hundred eighteen million, one hundred twenty-two thousand, twenty-one".