1231011321199 has 4 divisors (see below), whose sum is σ = 1342921441320. Its totient is φ = 1119101201080.

The previous prime is 1231011321187. The next prime is 1231011321217. The reversal of 1231011321199 is 9911231101321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231011321199 - 2⁹ = 1231011320687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231011321899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55955060044 + ... + 55955060065.

It is an arithmetic number, because the mean of its divisors is an integer number (335730360330).

Almost surely, 2^{1231011321199} is an apocalyptic number.

1231011321199 is a deficient number, since it is larger than the sum of its proper divisors (111910120121).

1231011321199 is a wasteful number, since it uses less digits than its factorization.

1231011321199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111910120120.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 1231011321199 in words is "one trillion, two hundred thirty-one billion, eleven million, three hundred twenty-one thousand, one hundred ninety-nine".