1210996907917 has 2 divisors, whose sum is σ = 1210996907918. Its totient is φ = 1210996907916.

The previous prime is 1210996907863. The next prime is 1210996907933. The reversal of 1210996907917 is 7197096990121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1134084424356 + 76912483561 = 1064934^2 + 277331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210996907917 - 2⁷ = 1210996907789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210996907977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605498453958 + 605498453959.

It is an arithmetic number, because the mean of its divisors is an integer number (605498453959).

Almost surely, 2^{1210996907917} is an apocalyptic number.

It is an amenable number.

1210996907917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210996907917 is an equidigital number, since it uses as much as digits as its factorization.

1210996907917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3857868, while the sum is 61.

The spelling of 1210996907917 in words is "one trillion, two hundred ten billion, nine hundred ninety-six million, nine hundred seven thousand, nine hundred seventeen".