1131222302021 has 6 divisors (see below), whose sum is σ = 1315911657510. Its totient is φ = 969619115976.

The previous prime is 1131222302003. The next prime is 1131222302057. The reversal of 1131222302021 is 1202032221311.

It can be written as a sum of positive squares in only one way, i.e., 705870505921 + 425351796100 = 840161^2 + 652190^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1131222302021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131222301984 and 1131222302002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131222302621) 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 5 ways as a sum of consecutive naturals, for example, 11543084666 + ... + 11543084763.

It is an arithmetic number, because the mean of its divisors is an integer number (219318609585).

Almost surely, 2^{1131222302021} is an apocalyptic number.

It is an amenable number.

1131222302021 is a deficient number, since it is larger than the sum of its proper divisors (184689355489).

1131222302021 is an equidigital number, since it uses as much as digits as its factorization.

1131222302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23086169443 (or 23086169436 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1131222302021 its reverse (1202032221311), we get a palindrome (2333254523332).

The spelling of 1131222302021 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-two million, three hundred two thousand, twenty-one".