20021022111 has 16 divisors (see below), whose sum is σ = 28332460800. Its totient is φ = 12532215168.

The previous prime is 20021022079. The next prime is 20021022127. The reversal of 20021022111 is 11122012002.

It is not a de Polignac number, because 20021022111 - 2⁵ = 20021022079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021022311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447091 + ... + 489828.

It is an arithmetic number, because the mean of its divisors is an integer number (1770778800).

Almost surely, 2^20021022111 is an apocalyptic number.

20021022111 is a deficient number, since it is larger than the sum of its proper divisors (8311438689).

20021022111 is a wasteful number, since it uses less digits than its factorization.

20021022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937358.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20021022111 its reverse (11122012002), we get a palindrome (31143034113).

The spelling of 20021022111 in words is "twenty billion, twenty-one million, twenty-two thousand, one hundred eleven".