221213635233 has 16 divisors (see below), whose sum is σ = 311335348800. Its totient is φ = 139713861888.

The previous prime is 221213635217. The next prime is 221213635241. The reversal of 221213635233 is 332536312122.

It is not a de Polignac number, because 221213635233 - 2⁴ = 221213635217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221213635194 and 221213635203.

It is not an unprimeable number, because it can be changed into a prime (221213635133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5354688 + ... + 5395841.

It is an arithmetic number, because the mean of its divisors is an integer number (19458459300).

Almost surely, 2^221213635233 is an apocalyptic number.

It is an amenable number.

221213635233 is a deficient number, since it is larger than the sum of its proper divisors (90121713567).

221213635233 is an equidigital number, since it uses as much as digits as its factorization.

221213635233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10750589 (or 10750551 counting only the distinct ones).

The product of its digits is 38880, while the sum is 33.

Adding to 221213635233 its reverse (332536312122), we get a palindrome (553749947355).

The spelling of 221213635233 in words is "two hundred twenty-one billion, two hundred thirteen million, six hundred thirty-five thousand, two hundred thirty-three".