121220302321 has 4 divisors (see below), whose sum is σ = 126490750272. Its totient is φ = 115949854372.

The previous prime is 121220302277. The next prime is 121220302337. The reversal of 121220302321 is 123203022121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 123203022121 = 58997 ⋅2088293.

It is a cyclic number.

It is not a de Polignac number, because 121220302321 - 2¹¹ = 121220300273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220302421) 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, 2635223941 + ... + 2635223986.

It is an arithmetic number, because the mean of its divisors is an integer number (31622687568).

Almost surely, 2^121220302321 is an apocalyptic number.

It is an amenable number.

121220302321 is a deficient number, since it is larger than the sum of its proper divisors (5270447951).

121220302321 is an equidigital number, since it uses as much as digits as its factorization.

121220302321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270447950.

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

Adding to 121220302321 its reverse (123203022121), we get a palindrome (244423324442).

The spelling of 121220302321 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred two thousand, three hundred twenty-one".