20202110121 has 4 divisors (see below), whose sum is σ = 26936146832. Its totient is φ = 13468073412.

The previous prime is 20202110087. The next prime is 20202110143. The reversal of 20202110121 is 12101120202.

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 not a de Polignac number, because 20202110121 - 2³⁰ = 19128368297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20202110097 and 20202110106.

It is not an unprimeable number, because it can be changed into a prime (20202110161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367018351 + ... + 3367018356.

It is an arithmetic number, because the mean of its divisors is an integer number (6734036708).

Almost surely, 2^20202110121 is an apocalyptic number.

It is an amenable number.

20202110121 is a deficient number, since it is larger than the sum of its proper divisors (6734036711).

20202110121 is an equidigital number, since it uses as much as digits as its factorization.

20202110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734036710.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20202110121 its reverse (12101120202), we get a palindrome (32303230323).

The spelling of 20202110121 in words is "twenty billion, two hundred two million, one hundred ten thousand, one hundred twenty-one".