21303120231224 has 64 divisors (see below), whose sum is σ = 43127958384000. Its totient is φ = 9806607313920.

The previous prime is 21303120231137. The next prime is 21303120231257. The reversal of 21303120231224 is 42213202130312.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 21303120231193 and 21303120231202.

It is a congruent number.

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, 292143329 + ... + 292216239.

It is an arithmetic number, because the mean of its divisors is an integer number (673874349750).

Almost surely, 2^{21303120231224} is an apocalyptic number.

It is an amenable number.

21303120231224 is an abundant number, since it is smaller than the sum of its proper divisors (21824838152776).

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

21303120231224 is a wasteful number, since it uses less digits than its factorization.

21303120231224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80208 (or 80204 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 21303120231224 its reverse (42213202130312), we get a palindrome (63516322361536).

The spelling of 21303120231224 in words is "twenty-one trillion, three hundred three billion, one hundred twenty million, two hundred thirty-one thousand, two hundred twenty-four".