21011023330 has 16 divisors (see below), whose sum is σ = 41258009664. Its totient is φ = 7640372080.

The previous prime is 21011023291. The next prime is 21011023361. The reversal of 21011023330 is 3332011012.

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 7 ways as a sum of consecutive naturals, for example, 95504542 + ... + 95504761.

It is an arithmetic number, because the mean of its divisors is an integer number (2578625604).

Almost surely, 2^21011023330 is an apocalyptic number.

21011023330 is a deficient number, since it is larger than the sum of its proper divisors (20246986334).

21011023330 is a wasteful number, since it uses less digits than its factorization.

21011023330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191009321.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21011023330 its reverse (3332011012), we get a palindrome (24343034342).

The spelling of 21011023330 in words is "twenty-one billion, eleven million, twenty-three thousand, three hundred thirty".