121221021222001 has 8 divisors (see below), whose sum is σ = 121522662989280. Its totient is φ = 120919438176768.

The previous prime is 121221021221981. The next prime is 121221021222073. The reversal of 121221021222001 is 100222120122121.

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 121221021222001 - 2¹⁷ = 121221021090929 is a prime.

It is a super-2 number, since 2×121221021222001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121221021222001.

It is not an unprimeable number, because it can be changed into a prime (121221021222101) 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, 10545291 + ... + 18805456.

It is an arithmetic number, because the mean of its divisors is an integer number (15190332873660).

Almost surely, 2^{121221021222001} is an apocalyptic number.

It is an amenable number.

121221021222001 is a deficient number, since it is larger than the sum of its proper divisors (301641767279).

121221021222001 is an equidigital number, since it uses as much as digits as its factorization.

121221021222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29361023.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221021222001 its reverse (100222120122121), we get a palindrome (221443141344122).

The spelling of 121221021222001 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, one".