21111133232 has 40 divisors (see below), whose sum is σ = 46854146976. Its totient is φ = 9026712576.

The previous prime is 21111133217. The next prime is 21111133237. The reversal of 21111133232 is 23233111112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21111133237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169163 + ... + 266154.

Almost surely, 2^21111133232 is an apocalyptic number.

It is an amenable number.

21111133232 is an abundant number, since it is smaller than the sum of its proper divisors (25743013744).

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

21111133232 is a wasteful number, since it uses less digits than its factorization.

21111133232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435765 (or 435759 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 21111133232 its reverse (23233111112), we get a palindrome (44344244344).

The spelling of 21111133232 in words is "twenty-one billion, one hundred eleven million, one hundred thirty-three thousand, two hundred thirty-two".