1223120211321 has 4 divisors (see below), whose sum is σ = 1630826948432. Its totient is φ = 815413474212.

The previous prime is 1223120211277. The next prime is 1223120211437. The reversal of 1223120211321 is 1231120213221.

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 not a de Polignac number, because 1223120211321 - 2³⁵ = 1188760472953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223120411321) 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, 203853368551 + ... + 203853368556.

It is an arithmetic number, because the mean of its divisors is an integer number (407706737108).

Almost surely, 2^{1223120211321} is an apocalyptic number.

It is an amenable number.

1223120211321 is a deficient number, since it is larger than the sum of its proper divisors (407706737111).

1223120211321 is an equidigital number, since it uses as much as digits as its factorization.

1223120211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407706737110.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1223120211321 its reverse (1231120213221), we get a palindrome (2454240424542).

The spelling of 1223120211321 in words is "one trillion, two hundred twenty-three billion, one hundred twenty million, two hundred eleven thousand, three hundred twenty-one".