115802611921 has 2 divisors, whose sum is σ = 115802611922. Its totient is φ = 115802611920.

The previous prime is 115802611879. The next prime is 115802611961. The reversal of 115802611921 is 129116208511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67514746896 + 48287865025 = 259836^2 + 219745^2 .

It is a cyclic number.

It is not a de Polignac number, because 115802611921 - 2¹¹ = 115802609873 is a prime.

It is not a weakly prime, because it can be changed into another prime (115802611961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57901305960 + 57901305961.

It is an arithmetic number, because the mean of its divisors is an integer number (57901305961).

Almost surely, 2^115802611921 is an apocalyptic number.

It is an amenable number.

115802611921 is a deficient number, since it is larger than the sum of its proper divisors (1).

115802611921 is an equidigital number, since it uses as much as digits as its factorization.

115802611921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 37.

The spelling of 115802611921 in words is "one hundred fifteen billion, eight hundred two million, six hundred eleven thousand, nine hundred twenty-one".