21203120230 has 16 divisors (see below), whose sum is σ = 38168134704. Its totient is φ = 8480688480.

The previous prime is 21203120219. The next prime is 21203120299. The reversal of 21203120230 is 3202130212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111625 + ... + 234235.

It is an arithmetic number, because the mean of its divisors is an integer number (2385508419).

Almost surely, 2^21203120230 is an apocalyptic number.

21203120230 is a deficient number, since it is larger than the sum of its proper divisors (16965014474).

21203120230 is a wasteful number, since it uses less digits than its factorization.

21203120230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139911.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21203120230 its reverse (3202130212), we get a palindrome (24405250442).

The spelling of 21203120230 in words is "twenty-one billion, two hundred three million, one hundred twenty thousand, two hundred thirty".