21130223203312 has 20 divisors (see below), whose sum is σ = 40941296542440. Its totient is φ = 10564727321408.

The previous prime is 21130223203301. The next prime is 21130223203321. The reversal of 21130223203312 is 21330232203112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23563618 + ... + 24443905.

It is an arithmetic number, because the mean of its divisors is an integer number (2047064827122).

Almost surely, 2^{21130223203312} is an apocalyptic number.

It is an amenable number.

21130223203312 is a deficient number, since it is larger than the sum of its proper divisors (19811073339128).

21130223203312 is a wasteful number, since it uses less digits than its factorization.

21130223203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48035040 (or 48035034 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21130223203312 its reverse (21330232203112), we get a palindrome (42460455406424).

The spelling of 21130223203312 in words is "twenty-one trillion, one hundred thirty billion, two hundred twenty-three million, two hundred three thousand, three hundred twelve".