21223111032 has 48 divisors (see below), whose sum is σ = 60860395440. Its totient is φ = 6658230528.

The previous prime is 21223110983. The next prime is 21223111051. The reversal of 21223111032 is 23011132212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21223110996 and 21223111014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8668348 + ... + 8670795.

It is an arithmetic number, because the mean of its divisors is an integer number (1267924905).

Almost surely, 2^21223111032 is an apocalyptic number.

It is an amenable number.

21223111032 is an abundant number, since it is smaller than the sum of its proper divisors (39637284408).

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

21223111032 is a wasteful number, since it uses less digits than its factorization.

21223111032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17339172 (or 17339165 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21223111032 its reverse (23011132212), we get a palindrome (44234243244).

The spelling of 21223111032 in words is "twenty-one billion, two hundred twenty-three million, one hundred eleven thousand, thirty-two".