11862494999021 has 2 divisors, whose sum is σ = 11862494999022. Its totient is φ = 11862494999020.

The previous prime is 11862494998909. The next prime is 11862494999023. The reversal of 11862494999021 is 12099949426811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6138199496521 + 5724295502500 = 2477539^2 + 2392550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11862494999021 is a prime.

Together with 11862494999023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11862494999023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5931247499510 + 5931247499511.

It is an arithmetic number, because the mean of its divisors is an integer number (5931247499511).

Almost surely, 2^{11862494999021} is an apocalyptic number.

It is an amenable number.

11862494999021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11862494999021 is an equidigital number, since it uses as much as digits as its factorization.

11862494999021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20155392, while the sum is 65.

The spelling of 11862494999021 in words is "eleven trillion, eight hundred sixty-two billion, four hundred ninety-four million, nine hundred ninety-nine thousand, twenty-one".