1223112202121 has 4 divisors (see below), whose sum is σ = 1223570127744. Its totient is φ = 1222654276500.

The previous prime is 1223112202111. The next prime is 1223112202133. The reversal of 1223112202121 is 1212022113221.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223112202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223112202093 and 1223112202102.

It is not an unprimeable number, because it can be changed into a prime (1223112202111) 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, 228958805 + ... + 228964146.

It is an arithmetic number, because the mean of its divisors is an integer number (305892531936).

Almost surely, 2^{1223112202121} is an apocalyptic number.

It is an amenable number.

1223112202121 is a deficient number, since it is larger than the sum of its proper divisors (457925623).

1223112202121 is an equidigital number, since it uses as much as digits as its factorization.

1223112202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457925622.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1223112202121 its reverse (1212022113221), we get a palindrome (2435134315342).

The spelling of 1223112202121 in words is "one trillion, two hundred twenty-three billion, one hundred twelve million, two hundred two thousand, one hundred twenty-one".