99121185563 has 2 divisors, whose sum is σ = 99121185564. Its totient is φ = 99121185562.

The previous prime is 99121185551. The next prime is 99121185589. The reversal of 99121185563 is 36558112199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99121185563 - 2⁴ = 99121185547 is a prime.

It is not a weakly prime, because it can be changed into another prime (99121185263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49560592781 + 49560592782.

It is an arithmetic number, because the mean of its divisors is an integer number (49560592782).

Almost surely, 2^99121185563 is an apocalyptic number.

99121185563 is a deficient number, since it is larger than the sum of its proper divisors (1).

99121185563 is an equidigital number, since it uses as much as digits as its factorization.

99121185563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 50.

The spelling of 99121185563 in words is "ninety-nine billion, one hundred twenty-one million, one hundred eighty-five thousand, five hundred sixty-three".