21214224204422 has 16 divisors (see below), whose sum is σ = 31888276236000. Its totient is φ = 10584808781760.

The previous prime is 21214224204391. The next prime is 21214224204451. The reversal of 21214224204422 is 22440242241212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1756079 + ... + 6746277.

It is an arithmetic number, because the mean of its divisors is an integer number (1993017264750).

Almost surely, 2^{21214224204422} is an apocalyptic number.

21214224204422 is a deficient number, since it is larger than the sum of its proper divisors (10674052031578).

21214224204422 is a wasteful number, since it uses less digits than its factorization.

21214224204422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994671.

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 21214224204422 its reverse (22440242241212), we get a palindrome (43654466445634).

The spelling of 21214224204422 in words is "twenty-one trillion, two hundred fourteen billion, two hundred twenty-four million, two hundred four thousand, four hundred twenty-two".