1131220211321 has 4 divisors (see below), whose sum is σ = 1190758117200. Its totient is φ = 1071682305444.

The previous prime is 1131220211291. The next prime is 1131220211377. The reversal of 1131220211321 is 1231120221311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1131220211321 - 2²² = 1131216017017 is a prime.

It is a super-2 number, since 2×1131220211321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131220211293 and 1131220211302.

It is not an unprimeable number, because it can be changed into a prime (1131220211921) 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, 29768952911 + ... + 29768952948.

It is an arithmetic number, because the mean of its divisors is an integer number (297689529300).

Almost surely, 2^{1131220211321} is an apocalyptic number.

It is an amenable number.

1131220211321 is a deficient number, since it is larger than the sum of its proper divisors (59537905879).

1131220211321 is an equidigital number, since it uses as much as digits as its factorization.

1131220211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59537905878.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1131220211321 its reverse (1231120221311), we get a palindrome (2362340432632).

The spelling of 1131220211321 in words is "one trillion, one hundred thirty-one billion, two hundred twenty million, two hundred eleven thousand, three hundred twenty-one".