121301322221 has 4 divisors (see below), whose sum is σ = 121453520412. Its totient is φ = 121149124032.

The previous prime is 121301322193. The next prime is 121301322239. The reversal of 121301322221 is 122223103121.

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 20884585225 + 100416736996 = 144515^2 + 316886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121301322221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121301322193 and 121301322202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121301322251) 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, 76097900 + ... + 76099493.

It is an arithmetic number, because the mean of its divisors is an integer number (30363380103).

Almost surely, 2^121301322221 is an apocalyptic number.

It is an amenable number.

121301322221 is a deficient number, since it is larger than the sum of its proper divisors (152198191).

121301322221 is an equidigital number, since it uses as much as digits as its factorization.

121301322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152198190.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 121301322221 its reverse (122223103121), we get a palindrome (243524425342).

The spelling of 121301322221 in words is "one hundred twenty-one billion, three hundred one million, three hundred twenty-two thousand, two hundred twenty-one".