1243320433011 has 12 divisors (see below), whose sum is σ = 1806661230192. Its totient is φ = 823916932656.

The previous prime is 1243320432989. The next prime is 1243320433057. The reversal of 1243320433011 is 1103340233421.

It is a happy number.

1243320433011 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 320 + 4 + 330 + 1 + 1 = 666.

It is not a de Polignac number, because 1243320433011 - 2⁵ = 1243320432979 is a prime.

It is a super-2 number, since 2×1243320433011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1243320433081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413611416 + ... + 413614421.

It is an arithmetic number, because the mean of its divisors is an integer number (150555102516).

Almost surely, 2^{1243320433011} is an apocalyptic number.

1243320433011 is a deficient number, since it is larger than the sum of its proper divisors (563340797181).

1243320433011 is a wasteful number, since it uses less digits than its factorization.

1243320433011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827226010 (or 827226007 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1243320433011 its reverse (1103340233421), we get a palindrome (2346660666432).

The spelling of 1243320433011 in words is "one trillion, two hundred forty-three billion, three hundred twenty million, four hundred thirty-three thousand, eleven".