1214262221 has 4 divisors (see below), whose sum is σ = 1214641500. Its totient is φ = 1213882944.

The previous prime is 1214262209. The next prime is 1214262223. The reversal of 1214262221 is 1222624121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 337273225 + 876988996 = 18365^2 + 29614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1214262221 - 2³⁰ = 140520397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214262223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184796 + ... + 191253.

It is an arithmetic number, because the mean of its divisors is an integer number (303660375).

Almost surely, 2^1214262221 is an apocalyptic number.

It is an amenable number.

1214262221 is a deficient number, since it is larger than the sum of its proper divisors (379279).

1214262221 is an equidigital number, since it uses as much as digits as its factorization.

1214262221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379278.

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

The square root of 1214262221 is about 34846.2655244432. The cubic root of 1214262221 is about 1066.8519639787.

Adding to 1214262221 its reverse (1222624121), we get a palindrome (2436886342).

The spelling of 1214262221 in words is "one billion, two hundred fourteen million, two hundred sixty-two thousand, two hundred twenty-one".