1131320230021 has 4 divisors (see below), whose sum is σ = 1161896452492. Its totient is φ = 1100744007552.

The previous prime is 1131320229971. The next prime is 1131320230031. The reversal of 1131320230021 is 1200320231311.

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 1050442557921 + 80877672100 = 1024911^2 + 284390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131320230021 - 2²¹ = 1131318132869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131320230031) 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, 15288111180 + ... + 15288111253.

It is an arithmetic number, because the mean of its divisors is an integer number (290474113123).

Almost surely, 2^{1131320230021} is an apocalyptic number.

It is an amenable number.

1131320230021 is a deficient number, since it is larger than the sum of its proper divisors (30576222471).

1131320230021 is an equidigital number, since it uses as much as digits as its factorization.

1131320230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30576222470.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1131320230021 its reverse (1200320231311), we get a palindrome (2331640461332).

The spelling of 1131320230021 in words is "one trillion, one hundred thirty-one billion, three hundred twenty million, two hundred thirty thousand, twenty-one".