11432442421 has 4 divisors (see below), whose sum is σ = 12104939052. Its totient is φ = 10759945792.

The previous prime is 11432442397. The next prime is 11432442487. The reversal of 11432442421 is 12424423411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12424423411 = 58309 ⋅213079.

It can be written as a sum of positive squares in 2 ways, for example, as 7206142321 + 4226300100 = 84889^2 + 65010^2 .

It is a cyclic number.

It is not a de Polignac number, because 11432442421 - 2²³ = 11424053813 is a prime.

It is a super-3 number, since 3×11432442421³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11432442421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11432442821) 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, 336248290 + ... + 336248323.

It is an arithmetic number, because the mean of its divisors is an integer number (3026234763).

Almost surely, 2^11432442421 is an apocalyptic number.

It is an amenable number.

11432442421 is a deficient number, since it is larger than the sum of its proper divisors (672496631).

11432442421 is an equidigital number, since it uses as much as digits as its factorization.

11432442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672496630.

The product of its digits is 6144, while the sum is 28.

Adding to 11432442421 its reverse (12424423411), we get a palindrome (23856865832).

The spelling of 11432442421 in words is "eleven billion, four hundred thirty-two million, four hundred forty-two thousand, four hundred twenty-one".