21221204014 has 8 divisors (see below), whose sum is σ = 31864390128. Its totient is φ = 10599740640.

The previous prime is 21221203979. The next prime is 21221204041. The reversal of 21221204014 is 41040212212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21221203982 and 21221204000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5428242 + ... + 5432149.

It is an arithmetic number, because the mean of its divisors is an integer number (3983048766).

Almost surely, 2^21221204014 is an apocalyptic number.

21221204014 is a deficient number, since it is larger than the sum of its proper divisors (10643186114).

21221204014 is a wasteful number, since it uses less digits than its factorization.

21221204014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10861370.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21221204014 its reverse (41040212212), we get a palindrome (62261416226).

The spelling of 21221204014 in words is "twenty-one billion, two hundred twenty-one million, two hundred four thousand, fourteen".