11432213421 has 4 divisors (see below), whose sum is σ = 15242951232. Its totient is φ = 7621475612.

The previous prime is 11432213383. The next prime is 11432213423. The reversal of 11432213421 is 12431223411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11432213421 - 2¹⁰ = 11432212397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11432213391 and 11432213400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11432213423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905368901 + ... + 1905368906.

It is an arithmetic number, because the mean of its divisors is an integer number (3810737808).

Almost surely, 2^11432213421 is an apocalyptic number.

It is an amenable number.

11432213421 is a deficient number, since it is larger than the sum of its proper divisors (3810737811).

11432213421 is an equidigital number, since it uses as much as digits as its factorization.

11432213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810737810.

The product of its digits is 1152, while the sum is 24.

Adding to 11432213421 its reverse (12431223411), we get a palindrome (23863436832).

The spelling of 11432213421 in words is "eleven billion, four hundred thirty-two million, two hundred thirteen thousand, four hundred twenty-one".