20214005221 has 4 divisors (see below), whose sum is σ = 20224810944. Its totient is φ = 20203199500.

The previous prime is 20214005191. The next prime is 20214005243. The reversal of 20214005221 is 12250041202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20214005221 - 2²⁵ = 20180450789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20214005821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5400055 + ... + 5403796.

It is an arithmetic number, because the mean of its divisors is an integer number (5056202736).

Almost surely, 2^20214005221 is an apocalyptic number.

It is an amenable number.

20214005221 is a deficient number, since it is larger than the sum of its proper divisors (10805723).

20214005221 is a wasteful number, since it uses less digits than its factorization.

20214005221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805722.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 20214005221 its reverse (12250041202), we get a palindrome (32464046423).

The spelling of 20214005221 in words is "twenty billion, two hundred fourteen million, five thousand, two hundred twenty-one".