21113120459 has 2 divisors, whose sum is σ = 21113120460. Its totient is φ = 21113120458.

The previous prime is 21113120401. The next prime is 21113120489. The reversal of 21113120459 is 95402131112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113120459 is a prime.

It is a super-3 number, since 3×21113120459³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21113120489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556560229 + 10556560230.

It is an arithmetic number, because the mean of its divisors is an integer number (10556560230).

Almost surely, 2^21113120459 is an apocalyptic number.

21113120459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113120459 is an equidigital number, since it uses as much as digits as its factorization.

21113120459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The spelling of 21113120459 in words is "twenty-one billion, one hundred thirteen million, one hundred twenty thousand, four hundred fifty-nine".