99194104721 has 2 divisors, whose sum is σ = 99194104722. Its totient is φ = 99194104720.

The previous prime is 99194104621. The next prime is 99194104733. The reversal of 99194104721 is 12740149199.

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., 71483508496 + 27710596225 = 267364^2 + 166465^2 .

It is a cyclic number.

It is not a de Polignac number, because 99194104721 - 2²⁶ = 99126995857 is a prime.

It is a super-2 number, since 2×99194104721² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99194104771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49597052360 + 49597052361.

It is an arithmetic number, because the mean of its divisors is an integer number (49597052361).

Almost surely, 2^99194104721 is an apocalyptic number.

It is an amenable number.

99194104721 is a deficient number, since it is larger than the sum of its proper divisors (1).

99194104721 is an equidigital number, since it uses as much as digits as its factorization.

99194104721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The spelling of 99194104721 in words is "ninety-nine billion, one hundred ninety-four million, one hundred four thousand, seven hundred twenty-one".