2101222123 has 24 divisors (see below), whose sum is σ = 2836740096. Its totient is φ = 1511359200.

The previous prime is 2101222121. The next prime is 2101222163. The reversal of 2101222123 is 3212221012.

It is a happy number.

It is not a de Polignac number, because 2101222123 - 2¹ = 2101222121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101222097 and 2101222106.

It is not an unprimeable number, because it can be changed into a prime (2101222121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67723 + ... + 93748.

It is an arithmetic number, because the mean of its divisors is an integer number (118197504).

Almost surely, 2^2101222123 is an apocalyptic number.

2101222123 is a deficient number, since it is larger than the sum of its proper divisors (735517973).

2101222123 is a wasteful number, since it uses less digits than its factorization.

2101222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161515 (or 161502 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2101222123 is about 45839.0894652152. The cubic root of 2101222123 is about 1280.8275335197.

Adding to 2101222123 its reverse (3212221012), we get a palindrome (5313443135).

The spelling of 2101222123 in words is "two billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-three".