21414079221 has 16 divisors (see below), whose sum is σ = 28598184000. Its totient is φ = 14253037568.

The previous prime is 21414079217. The next prime is 21414079237. The reversal of 21414079221 is 12297041412.

It is a cyclic number.

It is not a de Polignac number, because 21414079221 - 2² = 21414079217 is a prime.

It is a super-3 number, since 3×21414079221³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414079201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7932730 + ... + 7935428.

It is an arithmetic number, because the mean of its divisors is an integer number (1787386500).

Almost surely, 2^21414079221 is an apocalyptic number.

It is an amenable number.

21414079221 is a deficient number, since it is larger than the sum of its proper divisors (7184104779).

21414079221 is a wasteful number, since it uses less digits than its factorization.

21414079221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5988.

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 21414079221 in words is "twenty-one billion, four hundred fourteen million, seventy-nine thousand, two hundred twenty-one".