20212222211 has 8 divisors (see below), whose sum is σ = 21474866880. Its totient is φ = 18969461928.

The previous prime is 20212222193. The next prime is 20212222231. The reversal of 20212222211 is 11222221202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20212222211 - 2¹⁰ = 20212221187 is a prime.

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 20212222211.

It is not an unprimeable number, because it can be changed into a prime (20212222231) 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, 4969001 + ... + 4973066.

It is an arithmetic number, because the mean of its divisors is an integer number (2684358360).

Almost surely, 2^20212222211 is an apocalyptic number.

20212222211 is a deficient number, since it is larger than the sum of its proper divisors (1262644669).

20212222211 is a wasteful number, since it uses less digits than its factorization.

20212222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9942193.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20212222211 its reverse (11222221202), we get a palindrome (31434443413).

The spelling of 20212222211 in words is "twenty billion, two hundred twelve million, two hundred twenty-two thousand, two hundred eleven".