20010022111 has 4 divisors (see below), whose sum is σ = 20387569752. Its totient is φ = 19632474472.

The previous prime is 20010022099. The next prime is 20010022117. The reversal of 20010022111 is 11122001002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20010022111 - 2⁹ = 20010021599 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 (20010022117) 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, 188773741 + ... + 188773846.

It is an arithmetic number, because the mean of its divisors is an integer number (5096892438).

Almost surely, 2^20010022111 is an apocalyptic number.

20010022111 is a deficient number, since it is larger than the sum of its proper divisors (377547641).

20010022111 is an equidigital number, since it uses as much as digits as its factorization.

20010022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377547640.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20010022111 its reverse (11122001002), we get a palindrome (31132023113).

The spelling of 20010022111 in words is "twenty billion, ten million, twenty-two thousand, one hundred eleven".