113213121543 has 12 divisors (see below), whose sum is σ = 164181581928. Its totient is φ = 75174714000.

The previous prime is 113213121533. The next prime is 113213121583. The reversal of 113213121543 is 345121312311.

113213121543 is a `hidden beast` number, since 11 + 321 + 312 + 15 + 4 + 3 = 666.

It is not a de Polignac number, because 113213121543 - 2¹² = 113213117447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113213121523) 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, 25055980 + ... + 25060497.

It is an arithmetic number, because the mean of its divisors is an integer number (13681798494).

Almost surely, 2^113213121543 is an apocalyptic number.

113213121543 is a deficient number, since it is larger than the sum of its proper divisors (50968460385).

113213121543 is a wasteful number, since it uses less digits than its factorization.

113213121543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50116734 (or 50116731 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 113213121543 its reverse (345121312311), we get a palindrome (458334433854).

The spelling of 113213121543 in words is "one hundred thirteen billion, two hundred thirteen million, one hundred twenty-one thousand, five hundred forty-three".