121011200021021 has 4 divisors (see below), whose sum is σ = 121011227068032. Its totient is φ = 121011172974012.

The previous prime is 121011200020901. The next prime is 121011200021071. The reversal of 121011200021021 is 120120002110121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121011200021021 - 2²⁶ = 121011132912157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121011200020987 and 121011200021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011200021071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5037251 + ... + 16352256.

It is an arithmetic number, because the mean of its divisors is an integer number (30252806767008).

Almost surely, 2^{121011200021021} is an apocalyptic number.

It is an amenable number.

121011200021021 is a deficient number, since it is larger than the sum of its proper divisors (27047011).

121011200021021 is an equidigital number, since it uses as much as digits as its factorization.

121011200021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27047010.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121011200021021 its reverse (120120002110121), we get a palindrome (241131202131142).

The spelling of 121011200021021 in words is "one hundred twenty-one trillion, eleven billion, two hundred million, twenty-one thousand, twenty-one".