121001012120121 has 32 divisors (see below), whose sum is σ = 185006024663040. Its totient is φ = 68909994145344.

The previous prime is 121001012120099. The next prime is 121001012120137. The reversal of 121001012120121 is 121021210100121.

It is a happy number.

It is not a de Polignac number, because 121001012120121 - 2¹⁴ = 121001012103737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121001012120121.

It is not an unprimeable number, because it can be changed into a prime (121001012120621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371250 + ... + 15560843.

It is an arithmetic number, because the mean of its divisors is an integer number (5781438270720).

Almost surely, 2^{121001012120121} is an apocalyptic number.

It is an amenable number.

121001012120121 is a deficient number, since it is larger than the sum of its proper divisors (64005012542919).

121001012120121 is a wasteful number, since it uses less digits than its factorization.

121001012120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15933325.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121001012120121 its reverse (121021210100121), we get a palindrome (242022222220242).

The spelling of 121001012120121 in words is "one hundred twenty-one trillion, one billion, twelve million, one hundred twenty thousand, one hundred twenty-one".