21231230110 has 48 divisors (see below), whose sum is σ = 39813172128. Its totient is φ = 8145869760.

The previous prime is 21231230101. The next prime is 21231230213. The reversal of 21231230110 is 1103213212.

It is a super-2 number, since 2×21231230110² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1859479 + ... + 1870861.

It is an arithmetic number, because the mean of its divisors is an integer number (829441086).

Almost surely, 2^21231230110 is an apocalyptic number.

21231230110 is a deficient number, since it is larger than the sum of its proper divisors (18581942018).

21231230110 is a wasteful number, since it uses less digits than its factorization.

21231230110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11569 (or 11498 counting only the distinct ones).

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

Adding to 21231230110 its reverse (1103213212), we get a palindrome (22334443322).

The spelling of 21231230110 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirty thousand, one hundred ten".