21000024311422 has 16 divisors (see below), whose sum is σ = 33923197444752. Its totient is φ = 9692295698880.

The previous prime is 21000024311389. The next prime is 21000024311429. The reversal of 21000024311422 is 22411342000012.

It is a junction number, because it is equal to n+sod(n) for n = 21000024311393 and 21000024311402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000024311429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15188233 + ... + 16513099.

It is an arithmetic number, because the mean of its divisors is an integer number (2120199840297).

Almost surely, 2^{21000024311422} is an apocalyptic number.

21000024311422 is a deficient number, since it is larger than the sum of its proper divisors (12923173133330).

21000024311422 is a wasteful number, since it uses less digits than its factorization.

21000024311422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934523.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21000024311422 its reverse (22411342000012), we get a palindrome (43411366311434).

The spelling of 21000024311422 in words is "twenty-one trillion, twenty-four million, three hundred eleven thousand, four hundred twenty-two".