21233431011144 has 64 divisors (see below), whose sum is σ = 58642387200000. Its totient is φ = 6352925267520.

The previous prime is 21233431011131. The next prime is 21233431011173. The reversal of 21233431011144 is 44111013433212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509027644 + ... + 509069355.

It is an arithmetic number, because the mean of its divisors is an integer number (916287300000).

Almost surely, 2^{21233431011144} is an apocalyptic number.

21233431011144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21233431011144 is an abundant number, since it is smaller than the sum of its proper divisors (37408956188856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21233431011144 is a wasteful number, since it uses less digits than its factorization.

21233431011144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018097098 (or 1018097094 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 21233431011144 its reverse (44111013433212), we get a palindrome (65344444444356).

The spelling of 21233431011144 in words is "twenty-one trillion, two hundred thirty-three billion, four hundred thirty-one million, eleven thousand, one hundred forty-four".