121221002001101 has 4 divisors (see below), whose sum is σ = 121221661177500. Its totient is φ = 121220342824704.

The previous prime is 121221002001089. The next prime is 121221002001149. The reversal of 121221002001101 is 101100200122121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38208840568900 + 83012161432201 = 6181330^2 + 9111101^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221002001101 - 2¹⁴ = 121221001984717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221002021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329312276 + ... + 329680173.

It is an arithmetic number, because the mean of its divisors is an integer number (30305415294375).

Almost surely, 2^{121221002001101} is an apocalyptic number.

It is an amenable number.

121221002001101 is a deficient number, since it is larger than the sum of its proper divisors (659176399).

121221002001101 is an equidigital number, since it uses as much as digits as its factorization.

121221002001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659176398.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121221002001101 its reverse (101100200122121), we get a palindrome (222321202123222).

The spelling of 121221002001101 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two million, one thousand, one hundred one".