220121223233 has 4 divisors (see below), whose sum is σ = 233069530500. Its totient is φ = 207172915968.

The previous prime is 220121223229. The next prime is 220121223277. The reversal of 220121223233 is 332322121022.

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 76777205569 + 143344017664 = 277087^2 + 378608^2 .

It is a cyclic number.

It is not a de Polignac number, because 220121223233 - 2² = 220121223229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220121223199 and 220121223208.

It is not an unprimeable number, because it can be changed into a prime (220121223433) 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, 6474153608 + ... + 6474153641.

It is an arithmetic number, because the mean of its divisors is an integer number (58267382625).

Almost surely, 2^220121223233 is an apocalyptic number.

It is an amenable number.

220121223233 is a deficient number, since it is larger than the sum of its proper divisors (12948307267).

220121223233 is a wasteful number, since it uses less digits than its factorization.

220121223233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12948307266.

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

Adding to 220121223233 its reverse (332322121022), we get a palindrome (552443344255).

The spelling of 220121223233 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-three".