21223021330 has 32 divisors (see below), whose sum is σ = 43675386624. Its totient is φ = 7273697856.

The previous prime is 21223021301. The next prime is 21223021331. The reversal of 21223021330 is 3312032212.

It is a junction number, because it is equal to n+sod(n) for n = 21223021298 and 21223021307.

It is not an unprimeable number, because it can be changed into a prime (21223021331) 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 15 ways as a sum of consecutive naturals, for example, 132219 + ... + 244801.

It is an arithmetic number, because the mean of its divisors is an integer number (1364855832).

Almost surely, 2^21223021330 is an apocalyptic number.

21223021330 is an abundant number, since it is smaller than the sum of its proper divisors (22452365294).

21223021330 is a wasteful number, since it uses less digits than its factorization.

21223021330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115290.

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

Adding to 21223021330 its reverse (3312032212), we get a palindrome (24535053542).

The spelling of 21223021330 in words is "twenty-one billion, two hundred twenty-three million, twenty-one thousand, three hundred thirty".