1213213227 has 8 divisors (see below), whose sum is σ = 1629425616. Its totient is φ = 802904832.

The previous prime is 1213213217. The next prime is 1213213237. The reversal of 1213213227 is 7223123121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1213213217) and next prime (1213213237).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1213213227 - 2⁸ = 1213212971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213213197 and 1213213206.

It is not an unprimeable number, because it can be changed into a prime (1213213217) 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 in 7 ways as a sum of consecutive naturals, for example, 1475518 + ... + 1476339.

It is an arithmetic number, because the mean of its divisors is an integer number (203678202).

Almost surely, 2^1213213227 is an apocalyptic number.

1213213227 is a deficient number, since it is larger than the sum of its proper divisors (416212389).

1213213227 is a wasteful number, since it uses less digits than its factorization.

1213213227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951997.

The product of its digits is 1008, while the sum is 24.

The square root of 1213213227 is about 34831.2105302127. The cubic root of 1213213227 is about 1066.5446597540.

Adding to 1213213227 its reverse (7223123121), we get a palindrome (8436336348).

The spelling of 1213213227 in words is "one billion, two hundred thirteen million, two hundred thirteen thousand, two hundred twenty-seven".