121350440221 has 4 divisors (see below), whose sum is σ = 121370174944. Its totient is φ = 121330705500.

The previous prime is 121350440161. The next prime is 121350440291. The reversal of 121350440221 is 122044053121.

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: 122044053121 = 317 ⋅384997013.

It is a cyclic number.

It is not a de Polignac number, because 121350440221 - 2²¹ = 121348343069 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 (121350440291) 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, 9858135 + ... + 9870436.

It is an arithmetic number, because the mean of its divisors is an integer number (30342543736).

Almost surely, 2^121350440221 is an apocalyptic number.

It is an amenable number.

121350440221 is a deficient number, since it is larger than the sum of its proper divisors (19734723).

121350440221 is an equidigital number, since it uses as much as digits as its factorization.

121350440221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19734722.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 121350440221 its reverse (122044053121), we get a palindrome (243394493342).

The spelling of 121350440221 in words is "one hundred twenty-one billion, three hundred fifty million, four hundred forty thousand, two hundred twenty-one".