12011232505212 has 60 divisors (see below), whose sum is σ = 31447820262936. Its totient is φ = 3997612789920.

The previous prime is 12011232505187. The next prime is 12011232505241. The reversal of 12011232505212 is 21250523211021.

12011232505212 is a `hidden beast` number, since 1 + 2 + 0 + 112 + 3 + 25 + 0 + 521 + 2 = 666.

It is a super-2 number, since 2×12011232505212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28174114 + ... + 28597257.

Almost surely, 2^{12011232505212} is an apocalyptic number.

12011232505212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12011232505212 is an abundant number, since it is smaller than the sum of its proper divisors (19436587757724).

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

12011232505212 is a wasteful number, since it uses less digits than its factorization.

12011232505212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56772040 (or 56772029 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 12011232505212 its reverse (21250523211021), we get a palindrome (33261755716233).

The spelling of 12011232505212 in words is "twelve trillion, eleven billion, two hundred thirty-two million, five hundred five thousand, two hundred twelve".