2113666901 has 2 divisors, whose sum is σ = 2113666902. Its totient is φ = 2113666900.

The previous prime is 2113666879. The next prime is 2113666931. The reversal of 2113666901 is 1096663112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1924576900 + 189090001 = 43870^2 + 13751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113666901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113666931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056833450 + 1056833451.

It is an arithmetic number, because the mean of its divisors is an integer number (1056833451).

Almost surely, 2^2113666901 is an apocalyptic number.

It is an amenable number.

2113666901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113666901 is an equidigital number, since it uses as much as digits as its factorization.

2113666901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 2113666901 is about 45974.6332339911. The cubic root of 2113666901 is about 1283.3511837775.

The spelling of 2113666901 in words is "two billion, one hundred thirteen million, six hundred sixty-six thousand, nine hundred one".