21011312230 has 16 divisors (see below), whose sum is σ = 38742810624. Its totient is φ = 8199536320.

The previous prime is 21011312227. The next prime is 21011312237. The reversal of 21011312230 is 3221311012.

It is a super-3 number, since 3×21011312230³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011312237) 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 7 ways as a sum of consecutive naturals, for example, 25623142 + ... + 25623961.

It is an arithmetic number, because the mean of its divisors is an integer number (2421425664).

Almost surely, 2^21011312230 is an apocalyptic number.

21011312230 is a deficient number, since it is larger than the sum of its proper divisors (17731498394).

21011312230 is a wasteful number, since it uses less digits than its factorization.

21011312230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51247151.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21011312230 its reverse (3221311012), we get a palindrome (24232623242).

The spelling of 21011312230 in words is "twenty-one billion, eleven million, three hundred twelve thousand, two hundred thirty".