1320031211 has 4 divisors (see below), whose sum is σ = 1332847152. Its totient is φ = 1307215272.

The previous prime is 1320031201. The next prime is 1320031231. The reversal of 1320031211 is 1121300231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320031211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320031201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6407816 + ... + 6408021.

It is an arithmetic number, because the mean of its divisors is an integer number (333211788).

Almost surely, 2^1320031211 is an apocalyptic number.

1320031211 is a deficient number, since it is larger than the sum of its proper divisors (12815941).

1320031211 is a wasteful number, since it uses less digits than its factorization.

1320031211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815940.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1320031211 is about 36332.2337738818. The cubic root of 1320031211 is about 1096.9699561910.

Adding to 1320031211 its reverse (1121300231), we get a palindrome (2441331442).

The spelling of 1320031211 in words is "one billion, three hundred twenty million, thirty-one thousand, two hundred eleven".