121220320223 has 4 divisors (see below), whose sum is σ = 122353220520. Its totient is φ = 120087419928.

The previous prime is 121220320213. The next prime is 121220320259. The reversal of 121220320223 is 322023022121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121220320223 - 2²⁴ = 121203543007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220320195 and 121220320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220320213) 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, 566449988 + ... + 566450201.

It is an arithmetic number, because the mean of its divisors is an integer number (30588305130).

Almost surely, 2^121220320223 is an apocalyptic number.

121220320223 is a deficient number, since it is larger than the sum of its proper divisors (1132900297).

121220320223 is a wasteful number, since it uses less digits than its factorization.

121220320223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132900296.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 121220320223 its reverse (322023022121), we get a palindrome (443243342344).

The spelling of 121220320223 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred twenty thousand, two hundred twenty-three".