1012126931 has 4 divisors (see below), whose sum is σ = 1012235952. Its totient is φ = 1012017912.

The previous prime is 1012126919. The next prime is 1012126961. The reversal of 1012126931 is 1396212101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1396212101 = 191 ⋅7310011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012126931 is a prime.

It is a super-2 number, since 2×1012126931² = 2048801848910957522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012126931.

It is not an unprimeable number, because it can be changed into a prime (1012126961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39140 + ... + 59633.

It is an arithmetic number, because the mean of its divisors is an integer number (253058988).

Almost surely, 2^1012126931 is an apocalyptic number.

1012126931 is a deficient number, since it is larger than the sum of its proper divisors (109021).

1012126931 is an equidigital number, since it uses as much as digits as its factorization.

1012126931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109020.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 1012126931 is about 31813.9423995204. The cubic root of 1012126931 is about 1004.0260792658.

The spelling of 1012126931 in words is "one billion, twelve million, one hundred twenty-six thousand, nine hundred thirty-one".