21221204014434 has 32 divisors (see below), whose sum is σ = 42476303182464. Its totient is φ = 7068086864640.

The previous prime is 21221204014421. The next prime is 21221204014453. The reversal of 21221204014434 is 43441040212212.

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 15 ways as a sum of consecutive naturals, for example, 62609482 + ... + 62947514.

It is an arithmetic number, because the mean of its divisors is an integer number (1327384474452).

Almost surely, 2^{21221204014434} is an apocalyptic number.

21221204014434 is an abundant number, since it is smaller than the sum of its proper divisors (21255099168030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221204014434 is a wasteful number, since it uses less digits than its factorization.

21221204014434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346362.

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 21221204014434 its reverse (43441040212212), we get a palindrome (64662244226646).

The spelling of 21221204014434 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred four million, fourteen thousand, four hundred thirty-four".