21111111112230 has 96 divisors (see below), whose sum is σ = 58591549635840. Its totient is φ = 5258215932480.

The previous prime is 21111111112199. The next prime is 21111111112253. The reversal of 21111111112230 is 3221111111112.

21111111112230 is a `hidden beast` number, since 211 + 1 + 1 + 111 + 112 + 230 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86819992 + ... + 87062811.

It is an arithmetic number, because the mean of its divisors is an integer number (610328642040).

Almost surely, 2^{21111111112230} is an apocalyptic number.

21111111112230 is an abundant number, since it is smaller than the sum of its proper divisors (37480438523610).

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

21111111112230 is a wasteful number, since it uses less digits than its factorization.

21111111112230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173882906 (or 173882903 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 18.

Adding to 21111111112230 its reverse (3221111111112), we get a palindrome (24332222223342).

The spelling of 21111111112230 in words is "twenty-one trillion, one hundred eleven billion, one hundred eleven million, one hundred twelve thousand, two hundred thirty".