21112665433015 has 16 divisors (see below), whose sum is σ = 27285075691776. Its totient is φ = 15590310969600.

The previous prime is 21112665433009. The next prime is 21112665433021. The reversal of 21112665433015 is 51033456621112.

It is an interprime number because it is at equal distance from previous prime (21112665433009) and next prime (21112665433021).

It is not a de Polignac number, because 21112665433015 - 2⁹ = 21112665432503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4282791 + ... + 7782520.

It is an arithmetic number, because the mean of its divisors is an integer number (1705317230736).

Almost surely, 2^{21112665433015} is an apocalyptic number.

21112665433015 is a deficient number, since it is larger than the sum of its proper divisors (6172410258761).

21112665433015 is a wasteful number, since it uses less digits than its factorization.

21112665433015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12092250.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 21112665433015 in words is "twenty-one trillion, one hundred twelve billion, six hundred sixty-five million, four hundred thirty-three thousand, fifteen".