2111211012222 has 96 divisors (see below), whose sum is σ = 4970877545088. Its totient is φ = 643709058048.

The previous prime is 2111211012217. The next prime is 2111211012223. The reversal of 2111211012222 is 2222101121112.

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 = 2111211012195 and 2111211012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111211012223) 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, 204312168 + ... + 204322500.

It is an arithmetic number, because the mean of its divisors is an integer number (51779974428).

Almost surely, 2^{2111211012222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111211012222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2485438772544).

2111211012222 is an abundant number, since it is smaller than the sum of its proper divisors (2859666532866).

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

2111211012222 is a wasteful number, since it uses less digits than its factorization.

2111211012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18194 (or 18191 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2111211012222 its reverse (2222101121112), we get a palindrome (4333312133334).

The spelling of 2111211012222 in words is "two trillion, one hundred eleven billion, two hundred eleven million, twelve thousand, two hundred twenty-two".