21122301504 has 56 divisors (see below), whose sum is σ = 56000160288. Its totient is φ = 7026396160.

The previous prime is 21122301503. The next prime is 21122301511. The reversal of 21122301504 is 40510322112.

It is not an unprimeable number, because it can be changed into a prime (21122301503) 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 7 ways as a sum of consecutive naturals, for example, 17757 + ... + 206300.

Almost surely, 2^21122301504 is an apocalyptic number.

21122301504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21122301504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28000080144).

21122301504 is an abundant number, since it is smaller than the sum of its proper divisors (34877858784).

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

21122301504 is a wasteful number, since it uses less digits than its factorization.

21122301504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224563 (or 224553 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21122301504 its reverse (40510322112), we get a palindrome (61632623616).

The spelling of 21122301504 in words is "twenty-one billion, one hundred twenty-two million, three hundred one thousand, five hundred four".