2101122539 has 2 divisors, whose sum is σ = 2101122540. Its totient is φ = 2101122538.

The previous prime is 2101122523. The next prime is 2101122563. The reversal of 2101122539 is 9352211012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101122539 - 2⁴ = 2101122523 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101112539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050561269 + 1050561270.

It is an arithmetic number, because the mean of its divisors is an integer number (1050561270).

Almost surely, 2^2101122539 is an apocalyptic number.

2101122539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101122539 is an equidigital number, since it uses as much as digits as its factorization.

2101122539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 2101122539 is about 45838.0032178541. The cubic root of 2101122539 is about 1280.8072989552.

The spelling of 2101122539 in words is "two billion, one hundred one million, one hundred twenty-two thousand, five hundred thirty-nine".