121221110221201 has 8 divisors (see below), whose sum is σ = 121777788136608. Its totient is φ = 120665320860000.

The previous prime is 121221110221199. The next prime is 121221110221217. The reversal of 121221110221201 is 102122011122121.

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 121221110221201 - 2¹ = 121221110221199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221110227201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221865075 + ... + 222410776.

It is an arithmetic number, because the mean of its divisors is an integer number (15222223517076).

Almost surely, 2^{121221110221201} is an apocalyptic number.

It is an amenable number.

121221110221201 is a deficient number, since it is larger than the sum of its proper divisors (556677915407).

121221110221201 is an equidigital number, since it uses as much as digits as its factorization.

121221110221201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444277103.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121221110221201 its reverse (102122011122121), we get a palindrome (223343121343322).

The spelling of 121221110221201 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred ten million, two hundred twenty-one thousand, two hundred one".