21220001330 has 32 divisors (see below), whose sum is σ = 42554937600. Its totient is φ = 7552184320.

The previous prime is 21220001293. The next prime is 21220001357. The reversal of 21220001330 is 3310002212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2047055 + ... + 2057394.

It is an arithmetic number, because the mean of its divisors is an integer number (1329841800).

Almost surely, 2^21220001330 is an apocalyptic number.

21220001330 is an abundant number, since it is smaller than the sum of its proper divisors (21334936270).

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

21220001330 is a wasteful number, since it uses less digits than its factorization.

21220001330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104514.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21220001330 its reverse (3310002212), we get a palindrome (24530003542).

The spelling of 21220001330 in words is "twenty-one billion, two hundred twenty million, one thousand, three hundred thirty".