1214504221 has 4 divisors (see below), whose sum is σ = 1388004832. Its totient is φ = 1041003612.

The previous prime is 1214504219. The next prime is 1214504233. The reversal of 1214504221 is 1224054121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1224054121 = 61 ⋅20066461.

It is a cyclic number.

It is not a de Polignac number, because 1214504221 - 2¹ = 1214504219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1214504192 and 1214504201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1214504261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86750295 + ... + 86750308.

It is an arithmetic number, because the mean of its divisors is an integer number (347001208).

Almost surely, 2^1214504221 is an apocalyptic number.

It is an amenable number.

1214504221 is a deficient number, since it is larger than the sum of its proper divisors (173500611).

1214504221 is an equidigital number, since it uses as much as digits as its factorization.

1214504221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173500610.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1214504221 is about 34849.7377465025. The cubic root of 1214504221 is about 1066.9228330824.

Adding to 1214504221 its reverse (1224054121), we get a palindrome (2438558342).

The spelling of 1214504221 in words is "one billion, two hundred fourteen million, five hundred four thousand, two hundred twenty-one".