2122121243 has 8 divisors (see below), whose sum is σ = 2415695616. Its totient is φ = 1845322600.

The previous prime is 2122121227. The next prime is 2122121279. The reversal of 2122121243 is 3421212212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2122121243 - 2⁴ = 2122121227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2122121293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4193663 + ... + 4194168.

It is an arithmetic number, because the mean of its divisors is an integer number (301961952).

Almost surely, 2^2122121243 is an apocalyptic number.

2122121243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2122121243 is a deficient number, since it is larger than the sum of its proper divisors (293574373).

2122121243 is a wasteful number, since it uses less digits than its factorization.

2122121243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387865.

The product of its digits is 384, while the sum is 20.

The square root of 2122121243 is about 46066.4872005670. The cubic root of 2122121243 is about 1285.0599765089.

Adding to 2122121243 its reverse (3421212212), we get a palindrome (5543333455).

The spelling of 2122121243 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred forty-three".