21112112039 has 2 divisors, whose sum is σ = 21112112040. Its totient is φ = 21112112038.

The previous prime is 21112111987. The next prime is 21112112053. The reversal of 21112112039 is 93021121112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112112039 - 2²⁴ = 21095334823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112112069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556056019 + 10556056020.

It is an arithmetic number, because the mean of its divisors is an integer number (10556056020).

Almost surely, 2^21112112039 is an apocalyptic number.

21112112039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112112039 is an equidigital number, since it uses as much as digits as its factorization.

21112112039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21112112039 in words is "twenty-one billion, one hundred twelve million, one hundred twelve thousand, thirty-nine".