1320211331011 has 4 divisors (see below), whose sum is σ = 1320214208224. Its totient is φ = 1320208453800.

The previous prime is 1320211330979. The next prime is 1320211331029. The reversal of 1320211331011 is 1101331120231.

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 1320211331011 - 2⁵ = 1320211330979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320211331011.

It is not an unprimeable number, because it can be changed into a prime (1320211331041) 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, 579195 + ... + 1725076.

It is an arithmetic number, because the mean of its divisors is an integer number (330053552056).

Almost surely, 2^{1320211331011} is an apocalyptic number.

1320211331011 is a deficient number, since it is larger than the sum of its proper divisors (2877213).

1320211331011 is an equidigital number, since it uses as much as digits as its factorization.

1320211331011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877212.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1320211331011 its reverse (1101331120231), we get a palindrome (2421542451242).

The spelling of 1320211331011 in words is "one trillion, three hundred twenty billion, two hundred eleven million, three hundred thirty-one thousand, eleven".