2031121131985 has 16 divisors (see below), whose sum is σ = 2659008464640. Its totient is φ = 1477131085440.

The previous prime is 2031121131947. The next prime is 2031121132021. The reversal of 2031121131985 is 5891311211302.

It is not a de Polignac number, because 2031121131985 - 2¹⁷ = 2031121000913 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1158301 + ... + 2324629.

It is an arithmetic number, because the mean of its divisors is an integer number (166188029040).

Almost surely, 2^{2031121131985} is an apocalyptic number.

It is an amenable number.

2031121131985 is a deficient number, since it is larger than the sum of its proper divisors (627887332655).

2031121131985 is a wasteful number, since it uses less digits than its factorization.

2031121131985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198008.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 2031121131985 in words is "two trillion, thirty-one billion, one hundred twenty-one million, one hundred thirty-one thousand, nine hundred eighty-five".