21115223032 has 16 divisors (see below), whose sum is σ = 41674782600. Its totient is φ = 10001947680.

The previous prime is 21115223027. The next prime is 21115223039. The reversal of 21115223032 is 23032251112.

It is a super-2 number, since 2×21115223032² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21115222994 and 21115223012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115223039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69457819 + ... + 69458122.

Almost surely, 2^21115223032 is an apocalyptic number.

It is an amenable number.

21115223032 is a deficient number, since it is larger than the sum of its proper divisors (20559559568).

21115223032 is a wasteful number, since it uses less digits than its factorization.

21115223032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138915966 (or 138915962 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21115223032 its reverse (23032251112), we get a palindrome (44147474144).

The spelling of 21115223032 in words is "twenty-one billion, one hundred fifteen million, two hundred twenty-three thousand, thirty-two".