121020121012011 has 16 divisors (see below), whose sum is σ = 176717777752320. Its totient is φ = 73211650780320.

The previous prime is 121020121012009. The next prime is 121020121012031. The reversal of 121020121012011 is 110210121020121.

It is a happy number.

It is not a de Polignac number, because 121020121012011 - 2¹ = 121020121012009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121020121012031) 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 15 ways as a sum of consecutive naturals, for example, 26297286055 + ... + 26297290656.

It is an arithmetic number, because the mean of its divisors is an integer number (11044861109520).

Almost surely, 2^{121020121012011} is an apocalyptic number.

121020121012011 is a deficient number, since it is larger than the sum of its proper divisors (55697656740309).

121020121012011 is a wasteful number, since it uses less digits than its factorization.

121020121012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52594576786.

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

Adding to 121020121012011 its reverse (110210121020121), we get a palindrome (231230242032132).

The spelling of 121020121012011 in words is "one hundred twenty-one trillion, twenty billion, one hundred twenty-one million, twelve thousand, eleven".