121213020223 has 4 divisors (see below), whose sum is σ = 121216661248. Its totient is φ = 121209379200.

The previous prime is 121213020209. The next prime is 121213020233. The reversal of 121213020223 is 322020312121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121213020223 - 2⁵ = 121213020191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121213020223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213020233) 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, 1770111 + ... + 1837312.

It is an arithmetic number, because the mean of its divisors is an integer number (30304165312).

Almost surely, 2^121213020223 is an apocalyptic number.

121213020223 is a deficient number, since it is larger than the sum of its proper divisors (3641025).

121213020223 is an equidigital number, since it uses as much as digits as its factorization.

121213020223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641024.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121213020223 its reverse (322020312121), we get a palindrome (443233332344).

The spelling of 121213020223 in words is "one hundred twenty-one billion, two hundred thirteen million, twenty thousand, two hundred twenty-three".