121321213223 has 32 divisors (see below), whose sum is σ = 144599040000. Its totient is φ = 101702211072.

The previous prime is 121321213141. The next prime is 121321213243. The reversal of 121321213223 is 322312123121.

It is not a de Polignac number, because 121321213223 - 2²² = 121317018919 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 (121321213243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38672711 + ... + 38675847.

It is an arithmetic number, because the mean of its divisors is an integer number (4518720000).

Almost surely, 2^121321213223 is an apocalyptic number.

121321213223 is a deficient number, since it is larger than the sum of its proper divisors (23277826777).

121321213223 is an equidigital number, since it uses as much as digits as its factorization.

121321213223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604 (or 5590 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 121321213223 its reverse (322312123121), we get a palindrome (443633336344).

The spelling of 121321213223 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred twenty-three".