20020022111 has 4 divisors (see below), whose sum is σ = 20020518672. Its totient is φ = 20019525552.

The previous prime is 20020022101. The next prime is 20020022119. The reversal of 20020022111 is 11122002002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11122002002 = 2 ⋅5561001001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020022111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20020022092 and 20020022101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020022119) 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, 181886 + ... + 270411.

It is an arithmetic number, because the mean of its divisors is an integer number (5005129668).

Almost surely, 2^20020022111 is an apocalyptic number.

20020022111 is a deficient number, since it is larger than the sum of its proper divisors (496561).

20020022111 is an equidigital number, since it uses as much as digits as its factorization.

20020022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496560.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20020022111 its reverse (11122002002), we get a palindrome (31142024113).

The spelling of 20020022111 in words is "twenty billion, twenty million, twenty-two thousand, one hundred eleven".