21322423122 has 256 divisors, whose sum is σ = 59202662400. Its totient is φ = 4940559360.

The previous prime is 21322423121. The next prime is 21322423123. The reversal of 21322423122 is 22132422312.

It is an interprime number because it is at equal distance from previous prime (21322423121) and next prime (21322423123).

It is a junction number, because it is equal to n+sod(n) for n = 21322423092 and 21322423101.

It is not an unprimeable number, because it can be changed into a prime (21322423121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 50888629 + ... + 50889047.

It is an arithmetic number, because the mean of its divisors is an integer number (231260400).

Almost surely, 2^21322423122 is an apocalyptic number.

21322423122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21322423122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29601331200).

21322423122 is an abundant number, since it is smaller than the sum of its proper divisors (37880239278).

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

21322423122 is a wasteful number, since it uses less digits than its factorization.

21322423122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its digits is 2304, while the sum is 24.

Adding to 21322423122 its reverse (22132422312), we get a palindrome (43454845434).

It can be divided in two parts, 21322 and 423122, that added together give a palindrome (444444).

The spelling of 21322423122 in words is "twenty-one billion, three hundred twenty-two million, four hundred twenty-three thousand, one hundred twenty-two".