21235332112 has 10 divisors (see below), whose sum is σ = 41143455998. Its totient is φ = 10617666048.

The previous prime is 21235332101. The next prime is 21235332127. The reversal of 21235332112 is 21123353212.

It can be written as a sum of positive squares in only one way, i.e., 17674107136 + 3561224976 = 132944^2 + 59676^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663604113 + ... + 663604144.

Almost surely, 2^21235332112 is an apocalyptic number.

It is an amenable number.

21235332112 is a deficient number, since it is larger than the sum of its proper divisors (19908123886).

21235332112 is a wasteful number, since it uses less digits than its factorization.

21235332112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327208265 (or 1327208259 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

Adding to 21235332112 its reverse (21123353212), we get a palindrome (42358685324).

The spelling of 21235332112 in words is "twenty-one billion, two hundred thirty-five million, three hundred thirty-two thousand, one hundred twelve".