12053423421 has 12 divisors (see below), whose sum is σ = 18749769948. Its totient is φ = 7417491264.

The previous prime is 12053423387. The next prime is 12053423477. The reversal of 12053423421 is 12432435021.

12053423421 is a `hidden beast` number, since 1 + 205 + 34 + 2 + 3 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8127022500 + 3926400921 = 90150^2 + 62661^2 .

It is not a de Polignac number, because 12053423421 - 2³⁰ = 10979681597 is a prime.

It is a super-2 number, since 2×12053423421² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12053423321) 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, 51510240 + ... + 51510473.

It is an arithmetic number, because the mean of its divisors is an integer number (1562480829).

Almost surely, 2^12053423421 is an apocalyptic number.

It is an amenable number.

12053423421 is a deficient number, since it is larger than the sum of its proper divisors (6696346527).

12053423421 is a wasteful number, since it uses less digits than its factorization.

12053423421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103020732 (or 103020729 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 12053423421 its reverse (12432435021), we get a palindrome (24485858442).

The spelling of 12053423421 in words is "twelve billion, fifty-three million, four hundred twenty-three thousand, four hundred twenty-one".