21113030959 has 2 divisors, whose sum is σ = 21113030960. Its totient is φ = 21113030958.

The previous prime is 21113030929. The next prime is 21113031077. The reversal of 21113030959 is 95903031112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113030959 - 2⁹ = 21113030447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113030929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556515479 + 10556515480.

It is an arithmetic number, because the mean of its divisors is an integer number (10556515480).

Almost surely, 2^21113030959 is an apocalyptic number.

21113030959 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113030959 is an equidigital number, since it uses as much as digits as its factorization.

21113030959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 34.

The spelling of 21113030959 in words is "twenty-one billion, one hundred thirteen million, thirty thousand, nine hundred fifty-nine".