21421254435422 has 8 divisors (see below), whose sum is σ = 32132910000000. Its totient is φ = 10710284435424.

The previous prime is 21421254435401. The next prime is 21421254435437. The reversal of 21421254435422 is 22453445212412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21421254435422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171313022 + ... + 171438017.

It is an arithmetic number, because the mean of its divisors is an integer number (4016613750000).

Almost surely, 2^{21421254435422} is an apocalyptic number.

21421254435422 is a deficient number, since it is larger than the sum of its proper divisors (10711655564578).

21421254435422 is a wasteful number, since it uses less digits than its factorization.

21421254435422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342782290.

The product of its digits is 614400, while the sum is 41.

Adding to 21421254435422 its reverse (22453445212412), we get a palindrome (43874699647834).

The spelling of 21421254435422 in words is "twenty-one trillion, four hundred twenty-one billion, two hundred fifty-four million, four hundred thirty-five thousand, four hundred twenty-two".