21220122330 has 96 divisors (see below), whose sum is σ = 63728503488. Its totient is φ = 4841664000.

The previous prime is 21220122323. The next prime is 21220122337. The reversal of 21220122330 is 3322102212.

21220122330 is a `hidden beast` number, since 212 + 2 + 0 + 122 + 330 = 666.

It is an interprime number because it is at equal distance from previous prime (21220122323) and next prime (21220122337).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21220122337) 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 47 ways as a sum of consecutive naturals, for example, 613596 + ... + 647255.

It is an arithmetic number, because the mean of its divisors is an integer number (663838578).

Almost surely, 2^21220122330 is an apocalyptic number.

21220122330 is an abundant number, since it is smaller than the sum of its proper divisors (42508381158).

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

21220122330 is a wasteful number, since it uses less digits than its factorization.

21220122330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260892 (or 1260889 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21220122330 its reverse (3322102212), we get a palindrome (24542224542).

The spelling of 21220122330 in words is "twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, three hundred thirty".