2122121123 has 2 divisors, whose sum is σ = 2122121124. Its totient is φ = 2122121122.

The previous prime is 2122121119. The next prime is 2122121161. The reversal of 2122121123 is 3211212212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2122121123 - 2² = 2122121119 is a prime.

It is a super-2 number, since 2×2122121123² = 9006796121365562258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2122181123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061060561 + 1061060562.

It is an arithmetic number, because the mean of its divisors is an integer number (1061060562).

Almost surely, 2^2122121123 is an apocalyptic number.

2122121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122121123 is an equidigital number, since it uses as much as digits as its factorization.

2122121123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 2122121123 is about 46066.4858981017. The cubic root of 2122121123 is about 1285.0599522867.

Adding to 2122121123 its reverse (3211212212), we get a palindrome (5333333335).

The spelling of 2122121123 in words is "two billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-three".