121001010212121 has 16 divisors (see below), whose sum is σ = 173943153284544. Its totient is φ = 74377254567744.

The previous prime is 121001010212099. The next prime is 121001010212123. The reversal of 121001010212121 is 121212010100121.

It is a happy number.

It is not a de Polignac number, because 121001010212121 - 2³¹ = 120998862728473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121001010212121.

It is not an unprimeable number, because it can be changed into a prime (121001010212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1768831251 + ... + 1768899656.

It is an arithmetic number, because the mean of its divisors is an integer number (10871447080284).

Almost surely, 2^{121001010212121} is an apocalyptic number.

It is an amenable number.

121001010212121 is a deficient number, since it is larger than the sum of its proper divisors (52942143072423).

121001010212121 is a wasteful number, since it uses less digits than its factorization.

121001010212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3537731800.

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

Adding to 121001010212121 its reverse (121212010100121), we get a palindrome (242213020312242).

The spelling of 121001010212121 in words is "one hundred twenty-one trillion, one billion, ten million, two hundred twelve thousand, one hundred twenty-one".