99919100051 has 2 divisors, whose sum is σ = 99919100052. Its totient is φ = 99919100050.

The previous prime is 99919099913. The next prime is 99919100101. The reversal of 99919100051 is 15000191999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99919100051 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 99919099975 and 99919100011.

It is not a weakly prime, because it can be changed into another prime (99919160051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49959550025 + 49959550026.

It is an arithmetic number, because the mean of its divisors is an integer number (49959550026).

Almost surely, 2^99919100051 is an apocalyptic number.

99919100051 is a deficient number, since it is larger than the sum of its proper divisors (1).

99919100051 is an equidigital number, since it uses as much as digits as its factorization.

99919100051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32805, while the sum is 44.

The spelling of 99919100051 in words is "ninety-nine billion, nine hundred nineteen million, one hundred thousand, fifty-one".