1051311150521 has 2 divisors, whose sum is σ = 1051311150522. Its totient is φ = 1051311150520.

The previous prime is 1051311150509. The next prime is 1051311150553. The reversal of 1051311150521 is 1250511131501.

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., 915445190521 + 135865960000 = 956789^2 + 368600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051311150521 - 2¹⁸ = 1051310888377 is a prime.

It is a super-2 number, since 2×1051311150521² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1051311150221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525655575260 + 525655575261.

It is an arithmetic number, because the mean of its divisors is an integer number (525655575261).

Almost surely, 2^{1051311150521} is an apocalyptic number.

It is an amenable number.

1051311150521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051311150521 is an equidigital number, since it uses as much as digits as its factorization.

1051311150521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 750, while the sum is 26.

The spelling of 1051311150521 in words is "one trillion, fifty-one billion, three hundred eleven million, one hundred fifty thousand, five hundred twenty-one".