1131230220232 has 64 divisors (see below), whose sum is σ = 2493134691840. Its totient is φ = 471036384000.

The previous prime is 1131230220187. The next prime is 1131230220233. The reversal of 1131230220232 is 2320220321311.

It is a super-2 number, since 2×1131230220232² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131230220233) 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 15 ways as a sum of consecutive naturals, for example, 1063057 + ... + 1841887.

It is an arithmetic number, because the mean of its divisors is an integer number (38955229560).

Almost surely, 2^{1131230220232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131230220232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1246567345920).

1131230220232 is an abundant number, since it is smaller than the sum of its proper divisors (1361904471608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131230220232 is a wasteful number, since it uses less digits than its factorization.

1131230220232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779582 (or 779578 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1131230220232 its reverse (2320220321311), we get a palindrome (3451450541543).

The spelling of 1131230220232 in words is "one trillion, one hundred thirty-one billion, two hundred thirty million, two hundred twenty thousand, two hundred thirty-two".