71021099 has 2 divisors, whose sum is σ = 71021100. Its totient is φ = 71021098.

The previous prime is 71021059. The next prime is 71021131. The reversal of 71021099 is 99012017.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71021099 - 2²⁴ = 54243883 is a prime.

It is a Chen prime.

It is equal to p_4174562 and since 71021099 and 4174562 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (71021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35510549 + 35510550.

It is an arithmetic number, because the mean of its divisors is an integer number (35510550).

Almost surely, 2^71021099 is an apocalyptic number.

71021099 is a deficient number, since it is larger than the sum of its proper divisors (1).

71021099 is an equidigital number, since it uses as much as digits as its factorization.

71021099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 71021099 is about 8427.4016754869. The cubic root of 71021099 is about 414.1227883042.

The spelling of 71021099 in words is "seventy-one million, twenty-one thousand, ninety-nine".