20111214222 has 96 divisors (see below), whose sum is σ = 49373856000. Its totient is φ = 6063290640.

The previous prime is 20111214157. The next prime is 20111214223. The reversal of 20111214222 is 22241211102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20111214195 and 20111214204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111214223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1292533 + ... + 1307999.

It is an arithmetic number, because the mean of its divisors is an integer number (514311000).

Almost surely, 2^20111214222 is an apocalyptic number.

20111214222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111214222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24686928000).

20111214222 is an abundant number, since it is smaller than the sum of its proper divisors (29262641778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111214222 is a wasteful number, since it uses less digits than its factorization.

20111214222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15699 (or 15682 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20111214222 its reverse (22241211102), we get a palindrome (42352425324).

The spelling of 20111214222 in words is "twenty billion, one hundred eleven million, two hundred fourteen thousand, two hundred twenty-two".