21113402327 has 2 divisors, whose sum is σ = 21113402328. Its totient is φ = 21113402326.

The previous prime is 21113402311. The next prime is 21113402329. The reversal of 21113402327 is 72320431112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21113402327 - 2⁴ = 21113402311 is a prime.

Together with 21113402329, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113402296 and 21113402305.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113402329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556701163 + 10556701164.

It is an arithmetic number, because the mean of its divisors is an integer number (10556701164).

Almost surely, 2^21113402327 is an apocalyptic number.

21113402327 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113402327 is an equidigital number, since it uses as much as digits as its factorization.

21113402327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

Adding to 21113402327 its reverse (72320431112), we get a palindrome (93433833439).

The spelling of 21113402327 in words is "twenty-one billion, one hundred thirteen million, four hundred two thousand, three hundred twenty-seven".