21401440220422 has 16 divisors (see below), whose sum is σ = 32632724970144. Its totient is φ = 10523911464000.

The previous prime is 21401440220417. The next prime is 21401440220443. The reversal of 21401440220422 is 22402204410412.

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, 10628479 + ... + 12480682.

It is an arithmetic number, because the mean of its divisors is an integer number (2039545310634).

Almost surely, 2^{21401440220422} is an apocalyptic number.

21401440220422 is a deficient number, since it is larger than the sum of its proper divisors (11231284749722).

21401440220422 is a wasteful number, since it uses less digits than its factorization.

21401440220422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23116815.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 21401440220422 its reverse (22402204410412), we get a palindrome (43803644630834).

The spelling of 21401440220422 in words is "twenty-one trillion, four hundred one billion, four hundred forty million, two hundred twenty thousand, four hundred twenty-two".