21421131422 has 4 divisors (see below), whose sum is σ = 32131697136. Its totient is φ = 10710565710.

The previous prime is 21421131419. The next prime is 21421131451. The reversal of 21421131422 is 22413112412.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 5355282854 + ... + 5355282857.

It is an arithmetic number, because the mean of its divisors is an integer number (8032924284).

Almost surely, 2^21421131422 is an apocalyptic number.

21421131422 is a deficient number, since it is larger than the sum of its proper divisors (10710565714).

21421131422 is a wasteful number, since it uses less digits than its factorization.

21421131422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10710565713.

The product of its digits is 768, while the sum is 23.

Adding to 21421131422 its reverse (22413112412), we get a palindrome (43834243834).

The spelling of 21421131422 in words is "twenty-one billion, four hundred twenty-one million, one hundred thirty-one thousand, four hundred twenty-two".