21232231110 has 80 divisors (see below), whose sum is σ = 57656590992. Its totient is φ = 5605848000.

The previous prime is 21232231103. The next prime is 21232231117. The reversal of 21232231110 is 1113223212.

21232231110 is a `hidden beast` number, since 21 + 2 + 322 + 311 + 10 = 666.

It is an interprime number because it is at equal distance from previous prime (21232231103) and next prime (21232231117).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232231117) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47956 + ... + 211575.

Almost surely, 2^21232231110 is an apocalyptic number.

21232231110 is an abundant number, since it is smaller than the sum of its proper divisors (36424359882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232231110 is a wasteful number, since it uses less digits than its factorization.

21232231110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259651 (or 259642 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21232231110 its reverse (1113223212), we get a palindrome (22345454322).

The spelling of 21232231110 in words is "twenty-one billion, two hundred thirty-two million, two hundred thirty-one thousand, one hundred ten".