1235016161081 has 2 divisors, whose sum is σ = 1235016161082. Its totient is φ = 1235016161080.

The previous prime is 1235016161069. The next prime is 1235016161161. The reversal of 1235016161081 is 1801616105321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184701633600 + 50314527481 = 1088440^2 + 224309^2 .

It is a cyclic number.

It is not a de Polignac number, because 1235016161081 - 2¹⁰ = 1235016160057 is a prime.

It is a super-2 number, since 2×1235016161081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1235016161581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617508080540 + 617508080541.

It is an arithmetic number, because the mean of its divisors is an integer number (617508080541).

Almost surely, 2^{1235016161081} is an apocalyptic number.

It is an amenable number.

1235016161081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235016161081 is an equidigital number, since it uses as much as digits as its factorization.

1235016161081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 35.

The spelling of 1235016161081 in words is "one trillion, two hundred thirty-five billion, sixteen million, one hundred sixty-one thousand, eighty-one".