2113303909961 has 2 divisors, whose sum is σ = 2113303909962. Its totient is φ = 2113303909960.

The previous prime is 2113303909949. The next prime is 2113303909993. The reversal of 2113303909961 is 1699093033112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2038955526400 + 74348383561 = 1427920^2 + 272669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113303909961 - 2⁶ = 2113303909897 is a prime.

It is not a weakly prime, because it can be changed into another prime (2113303909361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056651954980 + 1056651954981.

It is an arithmetic number, because the mean of its divisors is an integer number (1056651954981).

Almost surely, 2^{2113303909961} is an apocalyptic number.

It is an amenable number.

2113303909961 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113303909961 is an equidigital number, since it uses as much as digits as its factorization.

2113303909961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 47.

The spelling of 2113303909961 in words is "two trillion, one hundred thirteen billion, three hundred three million, nine hundred nine thousand, nine hundred sixty-one".