20022111221 has 8 divisors (see below), whose sum is σ = 22884972864. Its totient is φ = 17159889600.

The previous prime is 20022111181. The next prime is 20022111223. The reversal of 20022111221 is 12211122002.

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

It is not a de Polignac number, because 20022111221 - 2²⁶ = 19955002357 is a prime.

It is a super-2 number, since 2×20022111221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20022111196 and 20022111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022111223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90980 + ... + 219821.

It is an arithmetic number, because the mean of its divisors is an integer number (2860621608).

Almost surely, 2^20022111221 is an apocalyptic number.

It is an amenable number.

20022111221 is a deficient number, since it is larger than the sum of its proper divisors (2862861643).

20022111221 is an equidigital number, since it uses as much as digits as its factorization.

20022111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320011.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20022111221 its reverse (12211122002), we get a palindrome (32233233223).

The spelling of 20022111221 in words is "twenty billion, twenty-two million, one hundred eleven thousand, two hundred twenty-one".