1213313311 has 8 divisors (see below), whose sum is σ = 1387211904. Its totient is φ = 1039556760.

The previous prime is 1213313291. The next prime is 1213313317. The reversal of 1213313311 is 1133133121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213313311 - 2⁵ = 1213313279 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 (1213313317) 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, 16525 + ... + 51958.

It is an arithmetic number, because the mean of its divisors is an integer number (173401488).

Almost surely, 2^1213313311 is an apocalyptic number.

1213313311 is a deficient number, since it is larger than the sum of its proper divisors (173898593).

1213313311 is an equidigital number, since it uses as much as digits as its factorization.

1213313311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71021.

The product of its digits is 162, while the sum is 19.

The square root of 1213313311 is about 34832.6472005789. The cubic root of 1213313311 is about 1066.5739871407.

Adding to 1213313311 its reverse (1133133121), we get a palindrome (2346446432).

It can be divided in two parts, 1 and 213313311, that added together give a palindrome (213313312).

The spelling of 1213313311 in words is "one billion, two hundred thirteen million, three hundred thirteen thousand, three hundred eleven".