12361040266021 has 4 divisors (see below), whose sum is σ = 12563680270444. Its totient is φ = 12158400261600.

The previous prime is 12361040266019. The next prime is 12361040266051. The reversal of 12361040266021 is 12066204016321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 695365860996 + 11665674405025 = 833886^2 + 3415505^2 .

It is a cyclic number.

It is not a de Polignac number, because 12361040266021 - 2¹ = 12361040266019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12361040266051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101320002120 + ... + 101320002241.

It is an arithmetic number, because the mean of its divisors is an integer number (3140920067611).

Almost surely, 2^{12361040266021} is an apocalyptic number.

It is an amenable number.

12361040266021 is a deficient number, since it is larger than the sum of its proper divisors (202640004423).

12361040266021 is an equidigital number, since it uses as much as digits as its factorization.

12361040266021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202640004422.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 12361040266021 in words is "twelve trillion, three hundred sixty-one billion, forty million, two hundred sixty-six thousand, twenty-one".