121211001002001 has 8 divisors (see below), whose sum is σ = 161615555744544. Its totient is φ = 80806890130400.

The previous prime is 121211001001991. The next prime is 121211001002011. The reversal of 121211001002001 is 100200100112121.

It is an interprime number because it is at equal distance from previous prime (121211001001991) and next prime (121211001002011).

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 121211001002001 - 2¹⁰ = 121211001000977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121211001002011) 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, 110330031 + ... + 111423236.

It is an arithmetic number, because the mean of its divisors is an integer number (20201944468068).

Almost surely, 2^{121211001002001} is an apocalyptic number.

It is an amenable number.

121211001002001 is a deficient number, since it is larger than the sum of its proper divisors (40404554742543).

121211001002001 is a wasteful number, since it uses less digits than its factorization.

121211001002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221935471.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121211001002001 its reverse (100200100112121), we get a palindrome (221411101114122).

The spelling of 121211001002001 in words is "one hundred twenty-one trillion, two hundred eleven billion, one million, two thousand, one".