20002211221 has 8 divisors (see below), whose sum is σ = 21057478400. Its totient is φ = 18947196000.

The previous prime is 20002211219. The next prime is 20002211227. The reversal of 20002211221 is 12211220002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20002211221 - 2¹ = 20002211219 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 (20002211227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112540 + ... + 229498.

It is an arithmetic number, because the mean of its divisors is an integer number (2632184800).

Almost surely, 2^20002211221 is an apocalyptic number.

It is an amenable number.

20002211221 is a deficient number, since it is larger than the sum of its proper divisors (1055267179).

20002211221 is a wasteful number, since it uses less digits than its factorization.

20002211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125979.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20002211221 its reverse (12211220002), we get a palindrome (32213431223).

The spelling of 20002211221 in words is "twenty billion, two million, two hundred eleven thousand, two hundred twenty-one".