21234201232 has 10 divisors (see below), whose sum is σ = 41141264918. Its totient is φ = 10617100608.

The previous prime is 21234201221. The next prime is 21234201269. The reversal of 21234201232 is 23210243212.

It can be written as a sum of positive squares in only one way, i.e., 21233152656 + 1048576 = 145716^2 + 1024^2 .

It is a super-2 number, since 2×21234201232² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663568773 + ... + 663568804.

Almost surely, 2^21234201232 is an apocalyptic number.

It is an amenable number.

21234201232 is a deficient number, since it is larger than the sum of its proper divisors (19907063686).

21234201232 is a wasteful number, since it uses less digits than its factorization.

21234201232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327137585 (or 1327137579 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21234201232 its reverse (23210243212), we get a palindrome (44444444444).

The spelling of 21234201232 in words is "twenty-one billion, two hundred thirty-four million, two hundred one thousand, two hundred thirty-two".