118456021 has 2 divisors, whose sum is σ = 118456022. Its totient is φ = 118456020.

The previous prime is 118456001. The next prime is 118456069. The reversal of 118456021 is 120654811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115799121 + 2656900 = 10761^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 118456021 - 2¹⁹ = 117931733 is a prime.

It is a super-2 number, since 2×118456021² = 28063657822304882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118456001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59228010 + 59228011.

It is an arithmetic number, because the mean of its divisors is an integer number (59228011).

Almost surely, 2^118456021 is an apocalyptic number.

It is an amenable number.

118456021 is a deficient number, since it is larger than the sum of its proper divisors (1).

118456021 is an equidigital number, since it uses as much as digits as its factorization.

118456021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 118456021 is about 10883.7503187091. The cubic root of 118456021 is about 491.1178435777.

The spelling of 118456021 in words is "one hundred eighteen million, four hundred fifty-six thousand, twenty-one".