20212222111 has 8 divisors (see below), whose sum is σ = 20887053264. Its totient is φ = 19546699200.

The previous prime is 20212222087. The next prime is 20212222123. The reversal of 20212222111 is 11122221202.

It is a happy number.

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

It is not a de Polignac number, because 20212222111 - 2⁹ = 20212221599 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 (20212222181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322646 + ... + 2331331.

It is an arithmetic number, because the mean of its divisors is an integer number (2610881658).

Almost surely, 2^20212222111 is an apocalyptic number.

20212222111 is a deficient number, since it is larger than the sum of its proper divisors (674831153).

20212222111 is a wasteful number, since it uses less digits than its factorization.

20212222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4654121.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20212222111 its reverse (11122221202), we get a palindrome (31334443313).

Subtracting from 20212222111 its reverse (11122221202), we obtain a palindrome (9090000909).

The spelling of 20212222111 in words is "twenty billion, two hundred twelve million, two hundred twenty-two thousand, one hundred eleven".