21221203414 has 8 divisors (see below), whose sum is σ = 33215796720. Its totient is φ = 10149271176.

The previous prime is 21221203397. The next prime is 21221203429. The reversal of 21221203414 is 41430212212.

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

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, 230665209 + ... + 230665300.

It is an arithmetic number, because the mean of its divisors is an integer number (4151974590).

Almost surely, 2^21221203414 is an apocalyptic number.

21221203414 is a deficient number, since it is larger than the sum of its proper divisors (11994593306).

21221203414 is a wasteful number, since it uses less digits than its factorization.

21221203414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461330534.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21221203414 its reverse (41430212212), we get a palindrome (62651415626).

The spelling of 21221203414 in words is "twenty-one billion, two hundred twenty-one million, two hundred three thousand, four hundred fourteen".