12011221432 has 24 divisors (see below), whose sum is σ = 26197945560. Its totient is φ = 5147666160.

The previous prime is 12011221427. The next prime is 12011221451. The reversal of 12011221432 is 23412211021.

It is a super-2 number, since 2×12011221432² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 15320044 + ... + 15320827.

It is an arithmetic number, because the mean of its divisors is an integer number (1091581065).

Almost surely, 2^12011221432 is an apocalyptic number.

It is an amenable number.

12011221432 is an abundant number, since it is smaller than the sum of its proper divisors (14186724128).

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

12011221432 is a wasteful number, since it uses less digits than its factorization.

12011221432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30640891 (or 30640880 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12011221432 its reverse (23412211021), we get a palindrome (35423432453).

The spelling of 12011221432 in words is "twelve billion, eleven million, two hundred twenty-one thousand, four hundred thirty-two".