1210971131 has 2 divisors, whose sum is σ = 1210971132. Its totient is φ = 1210971130.

The previous prime is 1210971119. The next prime is 1210971161. The reversal of 1210971131 is 1311790121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210971131 - 2¹⁸ = 1210708987 is a prime.

It is a super-2 number, since 2×1210971131² = 2932902160230838322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1210971131.

It is not a weakly prime, because it can be changed into another prime (1210971161) 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 as a sum of consecutive naturals, namely, 605485565 + 605485566.

It is an arithmetic number, because the mean of its divisors is an integer number (605485566).

Almost surely, 2^1210971131 is an apocalyptic number.

1210971131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210971131 is an equidigital number, since it uses as much as digits as its factorization.

1210971131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 26.

The square root of 1210971131 is about 34799.0104888056. The cubic root of 1210971131 is about 1065.8872402485.

The spelling of 1210971131 in words is "one billion, two hundred ten million, nine hundred seventy-one thousand, one hundred thirty-one".