1150131551021 has 2 divisors, whose sum is σ = 1150131551022. Its totient is φ = 1150131551020.

The previous prime is 1150131551011. The next prime is 1150131551069. The reversal of 1150131551021 is 1201551310511.

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., 933901900996 + 216229650025 = 966386^2 + 465005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1150131551021 - 2³⁰ = 1149057809197 is a prime.

It is a super-2 number, since 2×1150131551021² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1150131551011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575065775510 + 575065775511.

It is an arithmetic number, because the mean of its divisors is an integer number (575065775511).

Almost surely, 2^{1150131551021} is an apocalyptic number.

It is an amenable number.

1150131551021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1150131551021 is an equidigital number, since it uses as much as digits as its factorization.

1150131551021 is an evil number, because the sum of its binary digits is even.

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

Adding to 1150131551021 its reverse (1201551310511), we get a palindrome (2351682861532).

The spelling of 1150131551021 in words is "one trillion, one hundred fifty billion, one hundred thirty-one million, five hundred fifty-one thousand, twenty-one".