20111212222 has 8 divisors (see below), whose sum is σ = 30309789672. Its totient is φ = 10007949000.

The previous prime is 20111212217. The next prime is 20111212229. The reversal of 20111212222 is 22221211102.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20111212196 and 20111212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111212229) 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, 23828029 + ... + 23828872.

It is an arithmetic number, because the mean of its divisors is an integer number (3788723709).

Almost surely, 2^20111212222 is an apocalyptic number.

20111212222 is a deficient number, since it is larger than the sum of its proper divisors (10198577450).

20111212222 is a wasteful number, since it uses less digits than its factorization.

20111212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47657114.

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

Adding to 20111212222 its reverse (22221211102), we get a palindrome (42332423324).

The spelling of 20111212222 in words is "twenty billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-two".