1131221322001 has 4 divisors (see below), whose sum is σ = 1131226085412. Its totient is φ = 1131216558592.

The previous prime is 1131221321969. The next prime is 1131221322013. The reversal of 1131221322001 is 1002231221311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 744554991376 + 386666330625 = 862876^2 + 621825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131221322001 - 2⁵ = 1131221321969 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 1131221322001.

It is not an unprimeable number, because it can be changed into a prime (1131221322041) 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, 2005696 + ... + 2507041.

It is an arithmetic number, because the mean of its divisors is an integer number (282806521353).

Almost surely, 2^{1131221322001} is an apocalyptic number.

It is an amenable number.

1131221322001 is a deficient number, since it is larger than the sum of its proper divisors (4763411).

1131221322001 is an equidigital number, since it uses as much as digits as its factorization.

1131221322001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763410.

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

Adding to 1131221322001 its reverse (1002231221311), we get a palindrome (2133452543312).

The spelling of 1131221322001 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-one million, three hundred twenty-two thousand, one".