21101110224432 has 160 divisors (see below), whose sum is σ = 64335759581184. Its totient is φ = 5833536537600.

The previous prime is 21101110224391. The next prime is 21101110224449. The reversal of 21101110224432 is 23442201110112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2438544 + ... + 6938927.

Almost surely, 2^{21101110224432} is an apocalyptic number.

It is an amenable number.

21101110224432 is an abundant number, since it is smaller than the sum of its proper divisors (43234649356752).

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

21101110224432 is a wasteful number, since it uses less digits than its factorization.

21101110224432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9377707 (or 9377701 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21101110224432 its reverse (23442201110112), we get a palindrome (44543311334544).

The spelling of 21101110224432 in words is "twenty-one trillion, one hundred one billion, one hundred ten million, two hundred twenty-four thousand, four hundred thirty-two".