121001002121001 has 4 divisors (see below), whose sum is σ = 161334669494672. Its totient is φ = 80667334747332.

The previous prime is 121001002120987. The next prime is 121001002121137. The reversal of 121001002121001 is 100121200100121.

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 de Polignac number, because none of the positive numbers 2^k-121001002121001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001002121801) 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 3 ways as a sum of consecutive naturals, for example, 20166833686831 + ... + 20166833686836.

It is an arithmetic number, because the mean of its divisors is an integer number (40333667373668).

Almost surely, 2^{121001002121001} is an apocalyptic number.

It is an amenable number.

121001002121001 is a deficient number, since it is larger than the sum of its proper divisors (40333667373671).

121001002121001 is an equidigital number, since it uses as much as digits as its factorization.

121001002121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40333667373670.

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

Adding to 121001002121001 its reverse (100121200100121), we get a palindrome (221122202221122).

The spelling of 121001002121001 in words is "one hundred twenty-one trillion, one billion, two million, one hundred twenty-one thousand, one".