121020010011121 has 4 divisors (see below), whose sum is σ = 130329241550452. Its totient is φ = 111710778471792.

The previous prime is 121020010011119. The next prime is 121020010011163. The reversal of 121020010011121 is 121110010020121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63627567402721 + 57392442608400 = 7976689^2 + 7575780^2 .

It is a cyclic number.

It is not a de Polignac number, because 121020010011121 - 2¹ = 121020010011119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 9309231539317 = 121020010011121 / (1 + 2 + 1 + 0 + 2 + 0 + 0 + 1 + 0 + 0 + 1 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020010011821) 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 3 ways as a sum of consecutive naturals, for example, 4654615769646 + ... + 4654615769671.

It is an arithmetic number, because the mean of its divisors is an integer number (32582310387613).

Almost surely, 2^{121020010011121} is an apocalyptic number.

It is an amenable number.

121020010011121 is a deficient number, since it is larger than the sum of its proper divisors (9309231539331).

121020010011121 is an equidigital number, since it uses as much as digits as its factorization.

121020010011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9309231539330.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121020010011121 its reverse (121110010020121), we get a palindrome (242130020031242).

The spelling of 121020010011121 in words is "one hundred twenty-one trillion, twenty billion, ten million, eleven thousand, one hundred twenty-one".