20311210099 has 2 divisors, whose sum is σ = 20311210100. Its totient is φ = 20311210098.

The previous prime is 20311210091. The next prime is 20311210109. The reversal of 20311210099 is 99001211302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20311210099 - 2³ = 20311210091 is a prime.

It is not a weakly prime, because it can be changed into another prime (20311210091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155605049 + 10155605050.

It is an arithmetic number, because the mean of its divisors is an integer number (10155605050).

Almost surely, 2^20311210099 is an apocalyptic number.

20311210099 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311210099 is an equidigital number, since it uses as much as digits as its factorization.

20311210099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 20311210099 in words is "twenty billion, three hundred eleven million, two hundred ten thousand, ninety-nine".