1320111211 has 4 divisors (see below), whose sum is σ = 1321309152. Its totient is φ = 1318913272.

The previous prime is 1320111181. The next prime is 1320111229. The reversal of 1320111211 is 1121110231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1320111211 - 2¹⁹ = 1319586923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320111191 and 1320111200.

It is not an unprimeable number, because it can be changed into a prime (1320111281) 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, 597316 + ... + 599521.

It is an arithmetic number, because the mean of its divisors is an integer number (330327288).

Almost surely, 2^1320111211 is an apocalyptic number.

1320111211 is a deficient number, since it is larger than the sum of its proper divisors (1197941).

1320111211 is a wasteful number, since it uses less digits than its factorization.

1320111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197940.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1320111211 is about 36333.3347079510. The cubic root of 1320111211 is about 1096.9921162286.

Adding to 1320111211 its reverse (1121110231), we get a palindrome (2441221442).

The spelling of 1320111211 in words is "one billion, three hundred twenty million, one hundred eleven thousand, two hundred eleven".