121020120113 has 4 divisors (see below), whose sum is σ = 121491015780. Its totient is φ = 120549224448.

The previous prime is 121020120101. The next prime is 121020120163. The reversal of 121020120113 is 311021020121.

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 72572588449 + 48447531664 = 269393^2 + 220108^2 .

It is a cyclic number.

It is not a de Polignac number, because 121020120113 - 2⁶ = 121020120049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020120163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235447448 + ... + 235447961.

It is an arithmetic number, because the mean of its divisors is an integer number (30372753945).

Almost surely, 2^121020120113 is an apocalyptic number.

It is an amenable number.

121020120113 is a deficient number, since it is larger than the sum of its proper divisors (470895667).

121020120113 is an equidigital number, since it uses as much as digits as its factorization.

121020120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470895666.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121020120113 its reverse (311021020121), we get a palindrome (432041140234).

The spelling of 121020120113 in words is "one hundred twenty-one billion, twenty million, one hundred twenty thousand, one hundred thirteen".