21111012230232 has 32 divisors (see below), whose sum is σ = 52801123705200. Its totient is φ = 7033858326144.

The previous prime is 21111012230183. The next prime is 21111012230237. The reversal of 21111012230232 is 23203221011112.

It is a junction number, because it is equal to n+sod(n) for n = 21111012230199 and 21111012230208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111012230237) 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, 196554607 + ... + 196661982.

Almost surely, 2^{21111012230232} is an apocalyptic number.

It is an amenable number.

21111012230232 is an abundant number, since it is smaller than the sum of its proper divisors (31690111474968).

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

21111012230232 is a wasteful number, since it uses less digits than its factorization.

21111012230232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393218835 (or 393218831 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21111012230232 its reverse (23203221011112), we get a palindrome (44314233241344).

The spelling of 21111012230232 in words is "twenty-one trillion, one hundred eleven billion, twelve million, two hundred thirty thousand, two hundred thirty-two".