12011103534 has 64 divisors (see below), whose sum is σ = 26253331200. Its totient is φ = 3648910848.

The previous prime is 12011103509. The next prime is 12011103547. The reversal of 12011103534 is 43530111021.

It is a self number, because there is not a number n which added to its sum of digits gives 12011103534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388312 + ... + 418100.

It is an arithmetic number, because the mean of its divisors is an integer number (410208300).

Almost surely, 2^12011103534 is an apocalyptic number.

12011103534 is an abundant number, since it is smaller than the sum of its proper divisors (14242227666).

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

12011103534 is a wasteful number, since it uses less digits than its factorization.

12011103534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29937.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 12011103534 its reverse (43530111021), we get a palindrome (55541214555).

The spelling of 12011103534 in words is "twelve billion, eleven million, one hundred three thousand, five hundred thirty-four".