1131323221001 has 4 divisors (see below), whose sum is σ = 1131325379712. Its totient is φ = 1131321062292.

The previous prime is 1131323220991. The next prime is 1131323221009. The reversal of 1131323221001 is 1001223231311.

It is a happy number.

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 1131323221001 - 2¹⁰ = 1131323219977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131323221009) 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, 264380 + ... + 1527266.

It is an arithmetic number, because the mean of its divisors is an integer number (282831344928).

Almost surely, 2^{1131323221001} is an apocalyptic number.

It is an amenable number.

1131323221001 is a deficient number, since it is larger than the sum of its proper divisors (2158711).

1131323221001 is an equidigital number, since it uses as much as digits as its factorization.

1131323221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2158710.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1131323221001 its reverse (1001223231311), we get a palindrome (2132546452312).

The spelling of 1131323221001 in words is "one trillion, one hundred thirty-one billion, three hundred twenty-three million, two hundred twenty-one thousand, one".