14591212021 has 2 divisors, whose sum is σ = 14591212022. Its totient is φ = 14591212020.

The previous prime is 14591212003. The next prime is 14591212033. The reversal of 14591212021 is 12021219541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14499531396 + 91680625 = 120414^2 + 9575^2 .

It is an emirp because it is prime and its reverse (12021219541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 14591212021 - 2²³ = 14582823413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14591212921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7295606010 + 7295606011.

It is an arithmetic number, because the mean of its divisors is an integer number (7295606011).

Almost surely, 2^14591212021 is an apocalyptic number.

14591212021 is the 69741-st hex number.

It is an amenable number.

14591212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

14591212021 is an equidigital number, since it uses as much as digits as its factorization.

14591212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 14591212021 in words is "fourteen billion, five hundred ninety-one million, two hundred twelve thousand, twenty-one".