21010223330 has 32 divisors (see below), whose sum is σ = 40068452736. Its totient is φ = 7904706304.

The previous prime is 21010223329. The next prime is 21010223357. The reversal of 21010223330 is 3332201012.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 21010223299 and 21010223308.

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, 234737 + ... + 311643.

It is an arithmetic number, because the mean of its divisors is an integer number (1252139148).

Almost surely, 2^21010223330 is an apocalyptic number.

21010223330 is a deficient number, since it is larger than the sum of its proper divisors (19058229406).

21010223330 is a wasteful number, since it uses less digits than its factorization.

21010223330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78538.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21010223330 its reverse (3332201012), we get a palindrome (24342424342).

The spelling of 21010223330 in words is "twenty-one billion, ten million, two hundred twenty-three thousand, three hundred thirty".