2115536344021 has 4 divisors (see below), whose sum is σ = 2141024733792. Its totient is φ = 2090047954252.

The previous prime is 2115536344013. The next prime is 2115536344027. The reversal of 2115536344021 is 1204436355112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2115536344021 - 2³ = 2115536344013 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 (2115536344027) 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, 12744194761 + ... + 12744194926.

It is an arithmetic number, because the mean of its divisors is an integer number (535256183448).

Almost surely, 2^{2115536344021} is an apocalyptic number.

It is an amenable number.

2115536344021 is a deficient number, since it is larger than the sum of its proper divisors (25488389771).

2115536344021 is an equidigital number, since it uses as much as digits as its factorization.

2115536344021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25488389770.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 2115536344021 in words is "two trillion, one hundred fifteen billion, five hundred thirty-six million, three hundred forty-four thousand, twenty-one".