118221001 has 2 divisors, whose sum is σ = 118221002. Its totient is φ = 118221000.

The previous prime is 118220969. The next prime is 118221013. The reversal of 118221001 is 100122811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106110601 + 12110400 = 10301^2 + 3480^2 .

It is a cyclic number.

It is not a de Polignac number, because 118221001 - 2⁵ = 118220969 is a prime.

It is not a weakly prime, because it can be changed into another prime (118221601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59110500 + 59110501.

It is an arithmetic number, because the mean of its divisors is an integer number (59110501).

Almost surely, 2^118221001 is an apocalyptic number.

It is an amenable number.

118221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

118221001 is an equidigital number, since it uses as much as digits as its factorization.

118221001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 118221001 is about 10872.9481282677. The cubic root of 118221001 is about 490.7928314404.

Adding to 118221001 its reverse (100122811), we get a palindrome (218343812).

The spelling of 118221001 in words is "one hundred eighteen million, two hundred twenty-one thousand, one".