1118836021 has 2 divisors, whose sum is σ = 1118836022. Its totient is φ = 1118836020.

The previous prime is 1118836009. The next prime is 1118836031. The reversal of 1118836021 is 1206388111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962860900 + 155975121 = 31030^2 + 12489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1118836021 is a prime.

It is a super-2 number, since 2×1118836021² = 2503588083774224882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1118836031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559418010 + 559418011.

It is an arithmetic number, because the mean of its divisors is an integer number (559418011).

Almost surely, 2^1118836021 is an apocalyptic number.

It is an amenable number.

1118836021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1118836021 is an equidigital number, since it uses as much as digits as its factorization.

1118836021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1118836021 is about 33449.0062782140. The cubic root of 1118836021 is about 1038.1389364975.

The spelling of 1118836021 in words is "one billion, one hundred eighteen million, eight hundred thirty-six thousand, twenty-one".