221212410233 has 16 divisors (see below), whose sum is σ = 225969256656. Its totient is φ = 216477930240.

The previous prime is 221212410191. The next prime is 221212410239. The reversal of 221212410233 is 332014212122.

It can be written as a sum of positive squares in 8 ways, for example, as 4053614224 + 217158796009 = 63668^2 + 466003^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212410233 - 2¹² = 221212406137 is a prime.

It is a super-2 number, since 2×221212410233² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221212410199 and 221212410208.

It is not an unprimeable number, because it can be changed into a prime (221212410239) 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, 39129035 + ... + 39134687.

It is an arithmetic number, because the mean of its divisors is an integer number (14123078541).

Almost surely, 2^221212410233 is an apocalyptic number.

It is an amenable number.

221212410233 is a deficient number, since it is larger than the sum of its proper divisors (4756846423).

221212410233 is a wasteful number, since it uses less digits than its factorization.

221212410233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7484.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221212410233 its reverse (332014212122), we get a palindrome (553226622355).

The spelling of 221212410233 in words is "two hundred twenty-one billion, two hundred twelve million, four hundred ten thousand, two hundred thirty-three".