121133423221 has 4 divisors (see below), whose sum is σ = 121262702092. Its totient is φ = 121004144352.

The previous prime is 121133423171. The next prime is 121133423231. The reversal of 121133423221 is 122324331121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11233880100 + 109899543121 = 105990^2 + 331511^2 .

It is a cyclic number.

It is not a de Polignac number, because 121133423221 - 2¹¹ = 121133421173 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 (121133423231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64638030 + ... + 64639903.

It is an arithmetic number, because the mean of its divisors is an integer number (30315675523).

Almost surely, 2^121133423221 is an apocalyptic number.

It is an amenable number.

121133423221 is a deficient number, since it is larger than the sum of its proper divisors (129278871).

121133423221 is an equidigital number, since it uses as much as digits as its factorization.

121133423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129278870.

The product of its digits is 1728, while the sum is 25.

Adding to 121133423221 its reverse (122324331121), we get a palindrome (243457754342).

The spelling of 121133423221 in words is "one hundred twenty-one billion, one hundred thirty-three million, four hundred twenty-three thousand, two hundred twenty-one".