12021044432 has 20 divisors (see below), whose sum is σ = 23294853156. Its totient is φ = 6009469440.

The previous prime is 12021044351. The next prime is 12021044449. The reversal of 12021044432 is 23444012021.

It can be written as a sum of positive squares in 2 ways, for example, as 534349456 + 11486694976 = 23116^2 + 107176^2 .

It is a super-2 number, since 2×12021044432² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12021044398 and 12021044407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32888 + ... + 158504.

Almost surely, 2^12021044432 is an apocalyptic number.

It is an amenable number.

12021044432 is a deficient number, since it is larger than the sum of its proper divisors (11273808724).

12021044432 is a wasteful number, since it uses less digits than its factorization.

12021044432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131606 (or 131600 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12021044432 its reverse (23444012021), we get a palindrome (35465056453).

The spelling of 12021044432 in words is "twelve billion, twenty-one million, forty-four thousand, four hundred thirty-two".