2111136025261 has 2 divisors, whose sum is σ = 2111136025262. Its totient is φ = 2111136025260.

The previous prime is 2111136025181. The next prime is 2111136025303. The reversal of 2111136025261 is 1625206311112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1983537041161 + 127598984100 = 1408381^2 + 357210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111136025261 - 2¹⁹ = 2111135500973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111136023261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055568012630 + 1055568012631.

It is an arithmetic number, because the mean of its divisors is an integer number (1055568012631).

Almost surely, 2^{2111136025261} is an apocalyptic number.

It is an amenable number.

2111136025261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111136025261 is an equidigital number, since it uses as much as digits as its factorization.

2111136025261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 2111136025261 in words is "two trillion, one hundred eleven billion, one hundred thirty-six million, twenty-five thousand, two hundred sixty-one".