21113203252679 has 2 divisors, whose sum is σ = 21113203252680. Its totient is φ = 21113203252678.

The previous prime is 21113203252657. The next prime is 21113203252703. The reversal of 21113203252679 is 97625230231112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113203252679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113203252579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556601626339 + 10556601626340.

It is an arithmetic number, because the mean of its divisors is an integer number (10556601626340).

Almost surely, 2^{21113203252679} is an apocalyptic number.

21113203252679 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113203252679 is an equidigital number, since it uses as much as digits as its factorization.

21113203252679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 21113203252679 in words is "twenty-one trillion, one hundred thirteen billion, two hundred three million, two hundred fifty-two thousand, six hundred seventy-nine".