1320211311 has 8 divisors (see below), whose sum is σ = 1760908464. Its totient is φ = 879827520.

The previous prime is 1320211309. The next prime is 1320211337. The reversal of 1320211311 is 1131120231.

It is a happy number.

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

It is not a de Polignac number, because 1320211311 - 2¹ = 1320211309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320211511) 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, 68326 + ... + 85491.

It is an arithmetic number, because the mean of its divisors is an integer number (220113558).

Almost surely, 2^1320211311 is an apocalyptic number.

1320211311 is a deficient number, since it is larger than the sum of its proper divisors (440697153).

1320211311 is a wasteful number, since it uses less digits than its factorization.

1320211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156681.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1320211311 is about 36334.7122047224. The cubic root of 1320211311 is about 1097.0198427147.

Adding to 1320211311 its reverse (1131120231), we get a palindrome (2451331542).

The spelling of 1320211311 in words is "one billion, three hundred twenty million, two hundred eleven thousand, three hundred eleven".