21113014331 has 2 divisors, whose sum is σ = 21113014332. Its totient is φ = 21113014330.

The previous prime is 21113014327. The next prime is 21113014343. The reversal of 21113014331 is 13341031112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113014331 - 2² = 21113014327 is a prime.

It is a super-2 number, since 2×21113014331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21113614331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556507165 + 10556507166.

It is an arithmetic number, because the mean of its divisors is an integer number (10556507166).

Almost surely, 2^21113014331 is an apocalyptic number.

21113014331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113014331 is an equidigital number, since it uses as much as digits as its factorization.

21113014331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21113014331 its reverse (13341031112), we get a palindrome (34454045443).

The spelling of 21113014331 in words is "twenty-one billion, one hundred thirteen million, fourteen thousand, three hundred thirty-one".