2121132311123 has 16 divisors (see below), whose sum is σ = 2508039668160. Its totient is φ = 1755211920000.

The previous prime is 2121132311117. The next prime is 2121132311131. The reversal of 2121132311123 is 3211132311212.

It is a happy number.

It is not a de Polignac number, because 2121132311123 - 2⁴ = 2121132311107 is a prime.

It is a super-2 number, since 2×2121132311123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121132311143) 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 in 15 ways as a sum of consecutive naturals, for example, 1111133 + ... + 2340273.

It is an arithmetic number, because the mean of its divisors is an integer number (156752479260).

Almost surely, 2^{2121132311123} is an apocalyptic number.

2121132311123 is a deficient number, since it is larger than the sum of its proper divisors (386907357037).

2121132311123 is a wasteful number, since it uses less digits than its factorization.

2121132311123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237678.

The product of its digits is 432, while the sum is 23.

Adding to 2121132311123 its reverse (3211132311212), we get a palindrome (5332264622335).

The spelling of 2121132311123 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-two million, three hundred eleven thousand, one hundred twenty-three".