21030413231 has 2 divisors, whose sum is σ = 21030413232. Its totient is φ = 21030413230.

The previous prime is 21030413203. The next prime is 21030413267. The reversal of 21030413231 is 13231403012.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21030413231 is a prime.

It is a super-2 number, since 2×21030413231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030413291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515206615 + 10515206616.

It is an arithmetic number, because the mean of its divisors is an integer number (10515206616).

Almost surely, 2^21030413231 is an apocalyptic number.

21030413231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030413231 is an equidigital number, since it uses as much as digits as its factorization.

21030413231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21030413231 its reverse (13231403012), we get a palindrome (34261816243).

The spelling of 21030413231 in words is "twenty-one billion, thirty million, four hundred thirteen thousand, two hundred thirty-one".