21232311123 has 8 divisors (see below), whose sum is σ = 28417390848. Its totient is φ = 14101052744.

The previous prime is 21232311119. The next prime is 21232311223. The reversal of 21232311123 is 32111323212.

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

It is a cyclic number.

It is not a de Polignac number, because 21232311123 - 2² = 21232311119 is a prime.

It is a super-3 number, since 3×21232311123³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 21232311123.

It is not an unprimeable number, because it can be changed into a prime (21232311223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13454415 + ... + 13455992.

It is an arithmetic number, because the mean of its divisors is an integer number (3552173856).

Almost surely, 2^21232311123 is an apocalyptic number.

21232311123 is a deficient number, since it is larger than the sum of its proper divisors (7185079725).

21232311123 is a wasteful number, since it uses less digits than its factorization.

21232311123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26910673.

The product of its digits is 432, while the sum is 21.

Adding to 21232311123 its reverse (32111323212), we get a palindrome (53343634335).

It can be divided in two parts, 212323 and 11123, that added together give a triangular number (223446 = T₆₆₈).

The spelling of 21232311123 in words is "twenty-one billion, two hundred thirty-two million, three hundred eleven thousand, one hundred twenty-three".