21022132232 has 16 divisors (see below), whose sum is σ = 40481809260. Its totient is φ = 10226983104.

The previous prime is 21022132231. The next prime is 21022132249. The reversal of 21022132232 is 23223122012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17096608516 + 3925523716 = 130754^2 + 62654^2 .

It is a super-4 number, since 4×21022132232⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022132231) 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, 35510063 + ... + 35510654.

Almost surely, 2^21022132232 is an apocalyptic number.

It is an amenable number.

21022132232 is a deficient number, since it is larger than the sum of its proper divisors (19459677028).

21022132232 is a wasteful number, since it uses less digits than its factorization.

21022132232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71020760 (or 71020756 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21022132232 its reverse (23223122012), we get a palindrome (44245254244).

The spelling of 21022132232 in words is "twenty-one billion, twenty-two million, one hundred thirty-two thousand, two hundred thirty-two".