1320211001111 has 4 divisors (see below), whose sum is σ = 1338296083392. Its totient is φ = 1302125918832.

The previous prime is 1320211001093. The next prime is 1320211001141. The reversal of 1320211001111 is 1111001120231.

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 1320211001111 - 2⁶ = 1320211001047 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 (1320211001141) 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, 9042541031 + ... + 9042541176.

It is an arithmetic number, because the mean of its divisors is an integer number (334574020848).

Almost surely, 2^{1320211001111} is an apocalyptic number.

1320211001111 is a deficient number, since it is larger than the sum of its proper divisors (18085082281).

1320211001111 is an equidigital number, since it uses as much as digits as its factorization.

1320211001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18085082280.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1320211001111 its reverse (1111001120231), we get a palindrome (2431212121342).

The spelling of 1320211001111 in words is "one trillion, three hundred twenty billion, two hundred eleven million, one thousand, one hundred eleven".