121303213221 has 4 divisors (see below), whose sum is σ = 161737617632. Its totient is φ = 80868808812.

The previous prime is 121303213201. The next prime is 121303213289. The reversal of 121303213221 is 122312303121.

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 121303213221 - 2⁵ = 121303213189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121303213201) 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, 20217202201 + ... + 20217202206.

It is an arithmetic number, because the mean of its divisors is an integer number (40434404408).

Almost surely, 2^121303213221 is an apocalyptic number.

It is an amenable number.

121303213221 is a deficient number, since it is larger than the sum of its proper divisors (40434404411).

121303213221 is an equidigital number, since it uses as much as digits as its factorization.

121303213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40434404410.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121303213221 its reverse (122312303121), we get a palindrome (243615516342).

The spelling of 121303213221 in words is "one hundred twenty-one billion, three hundred three million, two hundred thirteen thousand, two hundred twenty-one".