20022111111221 has 4 divisors (see below), whose sum is σ = 20039940240672. Its totient is φ = 20004281981772.

The previous prime is 20022111111199. The next prime is 20022111111253. The reversal of 20022111111221 is 12211111122002.

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 20022111111221 - 2⁴² = 15624064600117 is a prime.

It is a super-2 number, since 2×20022111111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20022111111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022111101221) 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, 8914563041 + ... + 8914565286.

It is an arithmetic number, because the mean of its divisors is an integer number (5009985060168).

Almost surely, 2^{20022111111221} is an apocalyptic number.

It is an amenable number.

20022111111221 is a deficient number, since it is larger than the sum of its proper divisors (17829129451).

20022111111221 is a wasteful number, since it uses less digits than its factorization.

20022111111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17829129450.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20022111111221 its reverse (12211111122002), we get a palindrome (32233222233223).

The spelling of 20022111111221 in words is "twenty trillion, twenty-two billion, one hundred eleven million, one hundred eleven thousand, two hundred twenty-one".