121001202020121 has 4 divisors (see below), whose sum is σ = 161334936026832. Its totient is φ = 80667468013412.

The previous prime is 121001202020107. The next prime is 121001202020159. The reversal of 121001202020121 is 121020202100121.

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 121001202020121 - 2⁵ = 121001202020089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121001202020121.

It is not an unprimeable number, because it can be changed into a prime (121001202021121) 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, 20166867003351 + ... + 20166867003356.

It is an arithmetic number, because the mean of its divisors is an integer number (40333734006708).

Almost surely, 2^{121001202020121} is an apocalyptic number.

It is an amenable number.

121001202020121 is a deficient number, since it is larger than the sum of its proper divisors (40333734006711).

121001202020121 is an equidigital number, since it uses as much as digits as its factorization.

121001202020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40333734006710.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121001202020121 its reverse (121020202100121), we get a palindrome (242021404120242).

The spelling of 121001202020121 in words is "one hundred twenty-one trillion, one billion, two hundred two million, twenty thousand, one hundred twenty-one".