12229621 has 2 divisors, whose sum is σ = 12229622. Its totient is φ = 12229620.

The previous prime is 12229601. The next prime is 12229631. The reversal of 12229621 is 12692221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8328996 + 3900625 = 2886^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 12229621 - 2⁵ = 12229589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12229601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6114810 + 6114811.

It is an arithmetic number, because the mean of its divisors is an integer number (6114811).

Almost surely, 2^12229621 is an apocalyptic number.

It is an amenable number.

12229621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12229621 is an equidigital number, since it uses as much as digits as its factorization.

12229621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 12229621 is about 3497.0875024797. The cubic root of 12229621 is about 230.3939122479.

The spelling of 12229621 in words is "twelve million, two hundred twenty-nine thousand, six hundred twenty-one".