121322320221 has 8 divisors (see below), whose sum is σ = 165708535104. Its totient is φ = 78908826080.

The previous prime is 121322320211. The next prime is 121322320253. The reversal of 121322320221 is 122023223121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121322320221 - 2¹⁵ = 121322287453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121322320211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493180041 + ... + 493180286.

It is an arithmetic number, because the mean of its divisors is an integer number (20713566888).

Almost surely, 2^121322320221 is an apocalyptic number.

It is an amenable number.

121322320221 is a deficient number, since it is larger than the sum of its proper divisors (44386214883).

121322320221 is an equidigital number, since it uses as much as digits as its factorization.

121322320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986360371.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 121322320221 its reverse (122023223121), we get a palindrome (243345543342).

The spelling of 121322320221 in words is "one hundred twenty-one billion, three hundred twenty-two million, three hundred twenty thousand, two hundred twenty-one".