21112132234 has 8 divisors (see below), whose sum is σ = 31726736388. Its totient is φ = 10536553440.

The previous prime is 21112132231. The next prime is 21112132259. The reversal of 21112132234 is 43223121112.

It can be written as a sum of positive squares in 2 ways, for example, as 20122841025 + 989291209 = 141855^2 + 31453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21112132231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9754987 + ... + 9757150.

Almost surely, 2^21112132234 is an apocalyptic number.

21112132234 is a deficient number, since it is larger than the sum of its proper divisors (10614604154).

21112132234 is a wasteful number, since it uses less digits than its factorization.

21112132234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19512680.

The product of its digits is 576, while the sum is 22.

Adding to 21112132234 its reverse (43223121112), we get a palindrome (64335253346).

The spelling of 21112132234 in words is "twenty-one billion, one hundred twelve million, one hundred thirty-two thousand, two hundred thirty-four".