1031120120999 has 4 divisors (see below), whose sum is σ = 1040245077936. Its totient is φ = 1021995164064.

The previous prime is 1031120120977. The next prime is 1031120121029. The reversal of 1031120120999 is 9990210211301.

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 1031120120999 - 2²⁸ = 1030851685543 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 (1031120120909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4562478299 + ... + 4562478524.

It is an arithmetic number, because the mean of its divisors is an integer number (260061269484).

Almost surely, 2^{1031120120999} is an apocalyptic number.

1031120120999 is a deficient number, since it is larger than the sum of its proper divisors (9124956937).

1031120120999 is an equidigital number, since it uses as much as digits as its factorization.

1031120120999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124956936.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 1031120120999 in words is "one trillion, thirty-one billion, one hundred twenty million, one hundred twenty thousand, nine hundred ninety-nine".