11265993821 has 2 divisors, whose sum is σ = 11265993822. Its totient is φ = 11265993820.

The previous prime is 11265993811. The next prime is 11265993829. The reversal of 11265993821 is 12839956211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5885037796 + 5380956025 = 76714^2 + 73355^2 .

It is a cyclic number.

It is not a de Polignac number, because 11265993821 - 2⁶ = 11265993757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11265993829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5632996910 + 5632996911.

It is an arithmetic number, because the mean of its divisors is an integer number (5632996911).

Almost surely, 2^11265993821 is an apocalyptic number.

It is an amenable number.

11265993821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11265993821 is an equidigital number, since it uses as much as digits as its factorization.

11265993821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 47.

The spelling of 11265993821 in words is "eleven billion, two hundred sixty-five million, nine hundred ninety-three thousand, eight hundred twenty-one".