12220230121 has 4 divisors (see below), whose sum is σ = 13331160144. Its totient is φ = 11109300100.

The previous prime is 12220230089. The next prime is 12220230137. The reversal of 12220230121 is 12103202221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12103202221 = 11 ⋅1100291111.

It is a cyclic number.

It is not a de Polignac number, because 12220230121 - 2⁵ = 12220230089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220230095 and 12220230104.

It is not an unprimeable number, because it can be changed into a prime (12220230161) 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, 555464995 + ... + 555465016.

It is an arithmetic number, because the mean of its divisors is an integer number (3332790036).

Almost surely, 2^12220230121 is an apocalyptic number.

12220230121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12220230121 is a deficient number, since it is larger than the sum of its proper divisors (1110930023).

12220230121 is a wasteful number, since it uses less digits than its factorization.

12220230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110930022.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12220230121 its reverse (12103202221), we get a palindrome (24323432342).

The spelling of 12220230121 in words is "twelve billion, two hundred twenty million, two hundred thirty thousand, one hundred twenty-one".