121201000102001 has 4 divisors (see below), whose sum is σ = 126470608802112. Its totient is φ = 115931391401892.

The previous prime is 121201000101989. The next prime is 121201000102009. The reversal of 121201000102001 is 100201000102121.

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 121201000102001 - 2¹⁰ = 121201000100977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201000102009) 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, 2634804350021 + ... + 2634804350066.

It is an arithmetic number, because the mean of its divisors is an integer number (31617652200528).

Almost surely, 2^{121201000102001} is an apocalyptic number.

It is an amenable number.

121201000102001 is a deficient number, since it is larger than the sum of its proper divisors (5269608700111).

121201000102001 is an equidigital number, since it uses as much as digits as its factorization.

121201000102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269608700110.

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

Adding to 121201000102001 its reverse (100201000102121), we get a palindrome (221402000204122).

The spelling of 121201000102001 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred two thousand, one".