1214269921 has 2 divisors, whose sum is σ = 1214269922. Its totient is φ = 1214269920.

The previous prime is 1214269883. The next prime is 1214269937. The reversal of 1214269921 is 1299624121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 671379921 + 542890000 = 25911^2 + 23300^2 .

It is an emirp because it is prime and its reverse (1299624121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1214269921 - 2⁹ = 1214269409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1214261921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607134960 + 607134961.

It is an arithmetic number, because the mean of its divisors is an integer number (607134961).

Almost surely, 2^1214269921 is an apocalyptic number.

It is an amenable number.

1214269921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214269921 is an equidigital number, since it uses as much as digits as its factorization.

1214269921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 1214269921 is about 34846.3760095652. The cubic root of 1214269921 is about 1066.8542190497.

The spelling of 1214269921 in words is "one billion, two hundred fourteen million, two hundred sixty-nine thousand, nine hundred twenty-one".