1231202099 has 2 divisors, whose sum is σ = 1231202100. Its totient is φ = 1231202098.

The previous prime is 1231202041. The next prime is 1231202111. The reversal of 1231202099 is 9902021321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231202099 - 2¹⁶ = 1231136563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231205099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615601049 + 615601050.

It is an arithmetic number, because the mean of its divisors is an integer number (615601050).

Almost surely, 2^1231202099 is an apocalyptic number.

1231202099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231202099 is an equidigital number, since it uses as much as digits as its factorization.

1231202099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1231202099 is about 35088.4895514184. The cubic root of 1231202099 is about 1071.7902017014.

The spelling of 1231202099 in words is "one billion, two hundred thirty-one million, two hundred two thousand, ninety-nine".