612113012081 has 2 divisors, whose sum is σ = 612113012082. Its totient is φ = 612113012080.

The previous prime is 612113012011. The next prime is 612113012087. The reversal of 612113012081 is 180210311216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 401849495056 + 210263517025 = 633916^2 + 458545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612113012081 is a prime.

It is a super-2 number, since 2×612113012081² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 612113012081.

It is not a weakly prime, because it can be changed into another prime (612113012087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306056506040 + 306056506041.

It is an arithmetic number, because the mean of its divisors is an integer number (306056506041).

Almost surely, 2^612113012081 is an apocalyptic number.

It is an amenable number.

612113012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

612113012081 is an equidigital number, since it uses as much as digits as its factorization.

612113012081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 612113012081 its reverse (180210311216), we get a palindrome (792323323297).

The spelling of 612113012081 in words is "six hundred twelve billion, one hundred thirteen million, twelve thousand, eighty-one".