1213235776061 has 2 divisors, whose sum is σ = 1213235776062. Its totient is φ = 1213235776060.

The previous prime is 1213235776043. The next prime is 1213235776121. The reversal of 1213235776061 is 1606775323121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004655405625 + 208580370436 = 1002325^2 + 456706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213235776061 - 2¹⁴ = 1213235759677 is a prime.

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 (1213235778061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606617888030 + 606617888031.

It is an arithmetic number, because the mean of its divisors is an integer number (606617888031).

Almost surely, 2^{1213235776061} is an apocalyptic number.

It is an amenable number.

1213235776061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213235776061 is an equidigital number, since it uses as much as digits as its factorization.

1213235776061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 1213235776061 in words is "one trillion, two hundred thirteen billion, two hundred thirty-five million, seven hundred seventy-six thousand, sixty-one".