1131030123221 has 4 divisors (see below), whose sum is σ = 1137567869772. Its totient is φ = 1124492376672.

The previous prime is 1131030123101. The next prime is 1131030123259. The reversal of 1131030123221 is 1223210301311.

It is a happy number.

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 609039768100 + 521990355121 = 780410^2 + 722489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131030123221 - 2³⁰ = 1129956381397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131030123193 and 1131030123202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131030122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3268873016 + ... + 3268873361.

It is an arithmetic number, because the mean of its divisors is an integer number (284391967443).

Almost surely, 2^{1131030123221} is an apocalyptic number.

It is an amenable number.

1131030123221 is a deficient number, since it is larger than the sum of its proper divisors (6537746551).

1131030123221 is an equidigital number, since it uses as much as digits as its factorization.

1131030123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6537746550.

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

Adding to 1131030123221 its reverse (1223210301311), we get a palindrome (2354240424532).

The spelling of 1131030123221 in words is "one trillion, one hundred thirty-one billion, thirty million, one hundred twenty-three thousand, two hundred twenty-one".