21131313230 has 32 divisors (see below), whose sum is σ = 38969864640. Its totient is φ = 8247536640.

The previous prime is 21131313221. The next prime is 21131313253. The reversal of 21131313230 is 3231313112.

It is a super-3 number, since 3×21131313230³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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, 84545 + ... + 222284.

It is an arithmetic number, because the mean of its divisors is an integer number (1217808270).

Almost surely, 2^21131313230 is an apocalyptic number.

21131313230 is a deficient number, since it is larger than the sum of its proper divisors (17838551410).

21131313230 is a wasteful number, since it uses less digits than its factorization.

21131313230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307004.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21131313230 its reverse (3231313112), we get a palindrome (24362626342).

The spelling of 21131313230 in words is "twenty-one billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred thirty".