1031311031199 has 4 divisors (see below), whose sum is σ = 1375081374936. Its totient is φ = 687540687464.

The previous prime is 1031311031197. The next prime is 1031311031249. The reversal of 1031311031199 is 9911301131301.

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 1031311031199 - 2¹ = 1031311031197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031311031197) 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, 171885171864 + ... + 171885171869.

It is an arithmetic number, because the mean of its divisors is an integer number (343770343734).

Almost surely, 2^{1031311031199} is an apocalyptic number.

1031311031199 is a deficient number, since it is larger than the sum of its proper divisors (343770343737).

1031311031199 is an equidigital number, since it uses as much as digits as its factorization.

1031311031199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343770343736.

The product of its (nonzero) digits is 2187, while the sum is 33.

The spelling of 1031311031199 in words is "one trillion, thirty-one billion, three hundred eleven million, thirty-one thousand, one hundred ninety-nine".