1012134991261 has 2 divisors, whose sum is σ = 1012134991262. Its totient is φ = 1012134991260.

The previous prime is 1012134991237. The next prime is 1012134991331. The reversal of 1012134991261 is 1621994312101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995704622500 + 16430368761 = 997850^2 + 128181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012134991261 - 2¹¹ = 1012134989213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012134991201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506067495630 + 506067495631.

It is an arithmetic number, because the mean of its divisors is an integer number (506067495631).

Almost surely, 2^{1012134991261} is an apocalyptic number.

It is an amenable number.

1012134991261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012134991261 is an equidigital number, since it uses as much as digits as its factorization.

1012134991261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 1012134991261 in words is "one trillion, twelve billion, one hundred thirty-four million, nine hundred ninety-one thousand, two hundred sixty-one".