1223124213221 has 4 divisors (see below), whose sum is σ = 1225910373600. Its totient is φ = 1220338052844.

The previous prime is 1223124213217. The next prime is 1223124213239.

1223124213221 is nontrivially palindromic in base 10.

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 not a de Polignac number, because 1223124213221 - 2² = 1223124213217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223124243221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393079531 + ... + 1393080408.

It is an arithmetic number, because the mean of its divisors is an integer number (306477593400).

Almost surely, 2^{1223124213221} is an apocalyptic number.

It is an amenable number.

1223124213221 is a deficient number, since it is larger than the sum of its proper divisors (2786160379).

1223124213221 is an equidigital number, since it uses as much as digits as its factorization.

1223124213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786160378.

The product of its digits is 2304, while the sum is 26.

The spelling of 1223124213221 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-four million, two hundred thirteen thousand, two hundred twenty-one".