12699551099 has 2 divisors, whose sum is σ = 12699551100. Its totient is φ = 12699551098.

The previous prime is 12699551003. The next prime is 12699551149. The reversal of 12699551099 is 99015599621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12699551099 is a prime.

It is a super-2 number, since 2×12699551099² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12699551899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6349775549 + 6349775550.

It is an arithmetic number, because the mean of its divisors is an integer number (6349775550).

Almost surely, 2^12699551099 is an apocalyptic number.

12699551099 is a deficient number, since it is larger than the sum of its proper divisors (1).

12699551099 is an equidigital number, since it uses as much as digits as its factorization.

12699551099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1968300, while the sum is 56.

The spelling of 12699551099 in words is "twelve billion, six hundred ninety-nine million, five hundred fifty-one thousand, ninety-nine".