121010121010121 has 24 divisors (see below), whose sum is σ = 142751774727360. Its totient is φ = 102260449922400.

The previous prime is 121010121010099. The next prime is 121010121010133.

121010121010121 is nontrivially palindromic in base 10.

121010121010121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 121010121010121 - 2¹⁴ = 121010120993737 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010121010096 and 121010121010105.

It is not an unprimeable number, because it can be changed into a prime (121010121010321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251879666 + ... + 252359636.

It is an arithmetic number, because the mean of its divisors is an integer number (5947990613640).

Almost surely, 2^{121010121010121} is an apocalyptic number.

It is an amenable number.

121010121010121 is a deficient number, since it is larger than the sum of its proper divisors (21741653717239).

121010121010121 is an equidigital number, since it uses as much as digits as its factorization.

121010121010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552525 (or 552518 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

The spelling of 121010121010121 in words is "one hundred twenty-one trillion, ten billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".