118226021 has 2 divisors, whose sum is σ = 118226022. Its totient is φ = 118226020.

The previous prime is 118225993. The next prime is 118226057. The reversal of 118226021 is 120622811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105165025 + 13060996 = 10255^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 118226021 - 2²² = 114031717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59113010 + 59113011.

It is an arithmetic number, because the mean of its divisors is an integer number (59113011).

Almost surely, 2^118226021 is an apocalyptic number.

It is an amenable number.

118226021 is a deficient number, since it is larger than the sum of its proper divisors (1).

118226021 is an equidigital number, since it uses as much as digits as its factorization.

118226021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 118226021 is about 10873.1789739708. The cubic root of 118226021 is about 490.7997781620.

Adding to 118226021 its reverse (120622811), we get a palindrome (238848832).

The spelling of 118226021 in words is "one hundred eighteen million, two hundred twenty-six thousand, twenty-one".