21122330320 has 80 divisors (see below), whose sum is σ = 60442381440. Its totient is φ = 6684867072.

The previous prime is 21122330311. The next prime is 21122330363. The reversal of 21122330320 is 2303322112.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-4 number, since 4×21122330320⁴ (a number of 42 digits) contains 4444 as substring.

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, 1443430 + ... + 1457989.

It is an arithmetic number, because the mean of its divisors is an integer number (755529768).

Almost surely, 2^21122330320 is an apocalyptic number.

21122330320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122330320 is an abundant number, since it is smaller than the sum of its proper divisors (39320051120).

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

21122330320 is a wasteful number, since it uses less digits than its factorization.

21122330320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901452 (or 2901446 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21122330320 its reverse (2303322112), we get a palindrome (23425652432).

The spelling of 21122330320 in words is "twenty-one billion, one hundred twenty-two million, three hundred thirty thousand, three hundred twenty".