121110002020021 has 16 divisors (see below), whose sum is σ = 138444194358400. Its totient is φ = 103784002092288.

The previous prime is 121110002019983. The next prime is 121110002020057. The reversal of 121110002020021 is 120020200011121.

It is not a de Polignac number, because 121110002020021 - 2²⁹ = 121109465149109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121110002019983 and 121110002020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110002020081) 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, 1516811926 + ... + 1516891768.

It is an arithmetic number, because the mean of its divisors is an integer number (8652762147400).

Almost surely, 2^{121110002020021} is an apocalyptic number.

It is an amenable number.

121110002020021 is a deficient number, since it is larger than the sum of its proper divisors (17334192338379).

121110002020021 is an equidigital number, since it uses as much as digits as its factorization.

121110002020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128428.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121110002020021 its reverse (120020200011121), we get a palindrome (241130202031142).

The spelling of 121110002020021 in words is "one hundred twenty-one trillion, one hundred ten billion, two million, twenty thousand, twenty-one".