1220320131211 has 4 divisors (see below), whose sum is σ = 1221792170800. Its totient is φ = 1218848091624.

The previous prime is 1220320131203. The next prime is 1220320131259. The reversal of 1220320131211 is 1121310230221.

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 1220320131211 - 2³ = 1220320131203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220320131911) 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, 736018551 + ... + 736020208.

It is an arithmetic number, because the mean of its divisors is an integer number (305448042700).

Almost surely, 2^{1220320131211} is an apocalyptic number.

1220320131211 is a deficient number, since it is larger than the sum of its proper divisors (1472039589).

1220320131211 is an equidigital number, since it uses as much as digits as its factorization.

1220320131211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1472039588.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1220320131211 its reverse (1121310230221), we get a palindrome (2341630361432).

It can be divided in two parts, 1220320 and 131211, that added together give a palindrome (1351531).

The spelling of 1220320131211 in words is "one trillion, two hundred twenty billion, three hundred twenty million, one hundred thirty-one thousand, two hundred eleven".