1213211313 has 24 divisors (see below), whose sum is σ = 1847270880. Its totient is φ = 765149760.

The previous prime is 1213211297. The next prime is 1213211323. The reversal of 1213211313 is 3131123121.

It is not a de Polignac number, because 1213211313 - 2⁴ = 1213211297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213211323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125470 + ... + 134792.

It is an arithmetic number, because the mean of its divisors is an integer number (76969620).

Almost surely, 2^1213211313 is an apocalyptic number.

It is an amenable number.

1213211313 is a deficient number, since it is larger than the sum of its proper divisors (634059567).

1213211313 is a wasteful number, since it uses less digits than its factorization.

1213211313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10109 (or 10106 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1213211313 is about 34831.1830548433. The cubic root of 1213211313 is about 1066.5440988832.

Adding to 1213211313 its reverse (3131123121), we get a palindrome (4344334434).

The spelling of 1213211313 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, three hundred thirteen".