1135646531021 has 2 divisors, whose sum is σ = 1135646531022. Its totient is φ = 1135646531020.

The previous prime is 1135646531017. The next prime is 1135646531069. The reversal of 1135646531021 is 1201356465311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 867673620100 + 267972910921 = 931490^2 + 517661^2 .

It is an emirp because it is prime and its reverse (1201356465311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1135646531021 - 2² = 1135646531017 is a prime.

It is a super-2 number, since 2×1135646531021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1135646531081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 567823265510 + 567823265511.

It is an arithmetic number, because the mean of its divisors is an integer number (567823265511).

Almost surely, 2^{1135646531021} is an apocalyptic number.

It is an amenable number.

1135646531021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1135646531021 is an equidigital number, since it uses as much as digits as its factorization.

1135646531021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 1135646531021 in words is "one trillion, one hundred thirty-five billion, six hundred forty-six million, five hundred thirty-one thousand, twenty-one".