14421431021 has 2 divisors, whose sum is σ = 14421431022. Its totient is φ = 14421431020.

The previous prime is 14421430987. The next prime is 14421431077. The reversal of 14421431021 is 12013412441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11360575396 + 3060855625 = 106586^2 + 55325^2 .

It is a cyclic number.

It is not a de Polignac number, because 14421431021 - 2⁶ = 14421430957 is a prime.

It is a super-2 number, since 2×14421431021² (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 (14421434021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7210715510 + 7210715511.

It is an arithmetic number, because the mean of its divisors is an integer number (7210715511).

Almost surely, 2^14421431021 is an apocalyptic number.

It is an amenable number.

14421431021 is a deficient number, since it is larger than the sum of its proper divisors (1).

14421431021 is an equidigital number, since it uses as much as digits as its factorization.

14421431021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 14421431021 its reverse (12013412441), we get a palindrome (26434843462).

The spelling of 14421431021 in words is "fourteen billion, four hundred twenty-one million, four hundred thirty-one thousand, twenty-one".