121201100002001 has 4 divisors (see below), whose sum is σ = 121234369591152. Its totient is φ = 121167830412852.

The previous prime is 121201100001937. The next prime is 121201100002033. The reversal of 121201100002001 is 100200001102121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121201100002001 - 2⁶ = 121201100001937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201100002091) 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, 16634789111 + ... + 16634796396.

It is an arithmetic number, because the mean of its divisors is an integer number (30308592397788).

Almost surely, 2^{121201100002001} is an apocalyptic number.

It is an amenable number.

121201100002001 is a deficient number, since it is larger than the sum of its proper divisors (33269589151).

121201100002001 is an equidigital number, since it uses as much as digits as its factorization.

121201100002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33269589150.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121201100002001 its reverse (100200001102121), we get a palindrome (221401101104122).

The spelling of 121201100002001 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred million, two thousand, one".