1131210220231 has 24 divisors (see below), whose sum is σ = 1412991921024. Its totient is φ = 886658666400.

The previous prime is 1131210220229. The next prime is 1131210220253. The reversal of 1131210220231 is 1320220121311.

It is not a de Polignac number, because 1131210220231 - 2¹ = 1131210220229 is a prime.

It is a super-2 number, since 2×1131210220231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131210220199 and 1131210220208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131210220531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4341745 + ... + 4594906.

It is an arithmetic number, because the mean of its divisors is an integer number (58874663376).

Almost surely, 2^{1131210220231} is an apocalyptic number.

1131210220231 is a deficient number, since it is larger than the sum of its proper divisors (281781700793).

1131210220231 is a wasteful number, since it uses less digits than its factorization.

1131210220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8936791 (or 8936778 counting only the distinct ones).

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

Adding to 1131210220231 its reverse (1320220121311), we get a palindrome (2451430341542).

The spelling of 1131210220231 in words is "one trillion, one hundred thirty-one billion, two hundred ten million, two hundred twenty thousand, two hundred thirty-one".