21233123244 has 36 divisors (see below), whose sum is σ = 55660494344. Its totient is φ = 7077707424.

The previous prime is 21233123239. The next prime is 21233123287. The reversal of 21233123244 is 44232133212.

21233123244 is a `hidden beast` number, since 2 + 1 + 2 + 331 + 2 + 324 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10921417 + ... + 10923360.

Almost surely, 2^21233123244 is an apocalyptic number.

It is an amenable number.

21233123244 is an abundant number, since it is smaller than the sum of its proper divisors (34427371100).

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

21233123244 is a wasteful number, since it uses less digits than its factorization.

21233123244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21844796 (or 21844782 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 21233123244 its reverse (44232133212), we get a palindrome (65465256456).

The spelling of 21233123244 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-three thousand, two hundred forty-four".