121223213233 has 4 divisors (see below), whose sum is σ = 128353990500. Its totient is φ = 114092435968.

The previous prime is 121223213231. The next prime is 121223213269. The reversal of 121223213233 is 332312322121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38436386704 + 82786826529 = 196052^2 + 287727^2 .

It is a cyclic number.

It is not a de Polignac number, because 121223213233 - 2¹ = 121223213231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121223213198 and 121223213207.

It is not an unprimeable number, because it can be changed into a prime (121223213231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3565388608 + ... + 3565388641.

It is an arithmetic number, because the mean of its divisors is an integer number (32088497625).

Almost surely, 2^121223213233 is an apocalyptic number.

It is an amenable number.

121223213233 is a deficient number, since it is larger than the sum of its proper divisors (7130777267).

121223213233 is an equidigital number, since it uses as much as digits as its factorization.

121223213233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7130777266.

The product of its digits is 2592, while the sum is 25.

Adding to 121223213233 its reverse (332312322121), we get a palindrome (453535535354).

The spelling of 121223213233 in words is "one hundred twenty-one billion, two hundred twenty-three million, two hundred thirteen thousand, two hundred thirty-three".