1213221314 has 16 divisors (see below), whose sum is σ = 1850848056. Its totient is φ = 596284800.

The previous prime is 1213221313. The next prime is 1213221323. The reversal of 1213221314 is 4131223121.

It can be written as a sum of positive squares in 4 ways, for example, as 757185289 + 456036025 = 27517^2 + 21355^2 .

It is not an unprimeable number, because it can be changed into a prime (1213221311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337004 + ... + 340584.

Almost surely, 2^1213221314 is an apocalyptic number.

1213221314 is a deficient number, since it is larger than the sum of its proper divisors (637626742).

1213221314 is a wasteful number, since it uses less digits than its factorization.

1213221314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421.

The product of its digits is 288, while the sum is 20.

The square root of 1213221314 is about 34831.3266184336. The cubic root of 1213221314 is about 1066.5470295291.

Adding to 1213221314 its reverse (4131223121), we get a palindrome (5344444435).

The spelling of 1213221314 in words is "one billion, two hundred thirteen million, two hundred twenty-one thousand, three hundred fourteen".