2100122022222 has 96 divisors (see below), whose sum is σ = 5219968545792. Its totient is φ = 597767729472.

The previous prime is 2100122022217. The next prime is 2100122022223. The reversal of 2100122022222 is 2222202210012.

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 = 2100122022195 and 2100122022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100122022223) 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, 79787808 + ... + 79814124.

It is an arithmetic number, because the mean of its divisors is an integer number (54374672352).

Almost surely, 2^{2100122022222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2100122022222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2609984272896).

2100122022222 is an abundant number, since it is smaller than the sum of its proper divisors (3119846523570).

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

2100122022222 is a wasteful number, since it uses less digits than its factorization.

2100122022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28702 (or 28699 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2100122022222 its reverse (2222202210012), we get a palindrome (4322324232234).

The spelling of 2100122022222 in words is "two trillion, one hundred billion, one hundred twenty-two million, twenty-two thousand, two hundred twenty-two".