2121222123 has 6 divisors (see below), whose sum is σ = 3063987524. Its totient is φ = 1414148076.

The previous prime is 2121222109. The next prime is 2121222163. The reversal of 2121222123 is 3212221212.

It is not a de Polignac number, because 2121222123 - 2⁵ = 2121222091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121222096 and 2121222105.

It is not an unprimeable number, because it can be changed into a prime (2121222163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117845665 + ... + 117845682.

Almost surely, 2^2121222123 is an apocalyptic number.

2121222123 is a deficient number, since it is larger than the sum of its proper divisors (942765401).

2121222123 is a wasteful number, since it uses less digits than its factorization.

2121222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235691353 (or 235691350 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2121222123 is about 46056.7272284951. The cubic root of 2121222123 is about 1284.8784621635.

Adding to 2121222123 its reverse (3212221212), we get a palindrome (5333443335).

The spelling of 2121222123 in words is "two billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred twenty-three".