1313121211 has 8 divisors (see below), whose sum is σ = 1317254400. Its totient is φ = 1308995688.

The previous prime is 1313121193. The next prime is 1313121253. The reversal of 1313121211 is 1121213131.

It is a happy number.

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 1313121211 - 2¹⁵ = 1313088443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313121011) 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, 578100 + ... + 580366.

It is an arithmetic number, because the mean of its divisors is an integer number (164656800).

Almost surely, 2^1313121211 is an apocalyptic number.

1313121211 is a deficient number, since it is larger than the sum of its proper divisors (4133189).

1313121211 is an equidigital number, since it uses as much as digits as its factorization.

1313121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833.

The product of its digits is 36, while the sum is 16.

The square root of 1313121211 is about 36237.0143775670. The cubic root of 1313121211 is about 1095.0524945817.

Adding to 1313121211 its reverse (1121213131), we get a palindrome (2434334342).

The spelling of 1313121211 in words is "one billion, three hundred thirteen million, one hundred twenty-one thousand, two hundred eleven".