21100220233232 has 40 divisors (see below), whose sum is σ = 47361942498816. Its totient is φ = 8919075476736.

The previous prime is 21100220233207. The next prime is 21100220233271. The reversal of 21100220233232 is 23233202200112.

It is a junction number, because it is equal to n+sod(n) for n = 21100220233198 and 21100220233207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290367328 + ... + 1290383679.

Almost surely, 2^{21100220233232} is an apocalyptic number.

It is an amenable number.

21100220233232 is an abundant number, since it is smaller than the sum of its proper divisors (26261722265584).

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

21100220233232 is a wasteful number, since it uses less digits than its factorization.

21100220233232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580751095 (or 2580751089 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21100220233232 its reverse (23233202200112), we get a palindrome (44333422433344).

The spelling of 21100220233232 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, two hundred thirty-three thousand, two hundred thirty-two".