121111220321 has 8 divisors (see below), whose sum is σ = 149059963584. Its totient is φ = 95824262160.

The previous prime is 121111220297. The next prime is 121111220339. The reversal of 121111220321 is 123022111121.

It is a happy number.

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 121111220321 - 2³⁰ = 120037478497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121111220321.

It is not an unprimeable number, because it can be changed into a prime (121111220341) 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, 665446175 + ... + 665446356.

It is an arithmetic number, because the mean of its divisors is an integer number (18632495448).

Almost surely, 2^121111220321 is an apocalyptic number.

It is an amenable number.

121111220321 is a deficient number, since it is larger than the sum of its proper divisors (27948743263).

121111220321 is a wasteful number, since it uses less digits than its factorization.

121111220321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330892551.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121111220321 its reverse (123022111121), we get a palindrome (244133331442).

The spelling of 121111220321 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand, three hundred twenty-one".