21301222422 has 32 divisors (see below), whose sum is σ = 43269448320. Its totient is φ = 6989850560.

The previous prime is 21301222367. The next prime is 21301222429. The reversal of 21301222422 is 22422210312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301222429) 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 15 ways as a sum of consecutive naturals, for example, 63829 + ... + 216047.

It is an arithmetic number, because the mean of its divisors is an integer number (1352170260).

Almost surely, 2^21301222422 is an apocalyptic number.

21301222422 is an abundant number, since it is smaller than the sum of its proper divisors (21968225898).

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

21301222422 is a wasteful number, since it uses less digits than its factorization.

21301222422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152588.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21301222422 its reverse (22422210312), we get a palindrome (43723432734).

The spelling of 21301222422 in words is "twenty-one billion, three hundred one million, two hundred twenty-two thousand, four hundred twenty-two".