21113024503 has 2 divisors, whose sum is σ = 21113024504. Its totient is φ = 21113024502.

The previous prime is 21113024453. The next prime is 21113024519. The reversal of 21113024503 is 30542031112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21113024503 - 2²¹ = 21110927351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113024573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556512251 + 10556512252.

It is an arithmetic number, because the mean of its divisors is an integer number (10556512252).

Almost surely, 2^21113024503 is an apocalyptic number.

21113024503 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113024503 is an equidigital number, since it uses as much as digits as its factorization.

21113024503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21113024503 its reverse (30542031112), we get a palindrome (51655055615).

The spelling of 21113024503 in words is "twenty-one billion, one hundred thirteen million, twenty-four thousand, five hundred three".