12020210121 has 4 divisors (see below), whose sum is σ = 16026946832. Its totient is φ = 8013473412.

The previous prime is 12020210119. The next prime is 12020210131. The reversal of 12020210121 is 12101202021.

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 12020210121 - 2¹ = 12020210119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020210097 and 12020210106.

It is not an unprimeable number, because it can be changed into a prime (12020210131) 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, 2003368351 + ... + 2003368356.

It is an arithmetic number, because the mean of its divisors is an integer number (4006736708).

Almost surely, 2^12020210121 is an apocalyptic number.

It is an amenable number.

12020210121 is a deficient number, since it is larger than the sum of its proper divisors (4006736711).

12020210121 is an equidigital number, since it uses as much as digits as its factorization.

12020210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006736710.

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

Adding to 12020210121 its reverse (12101202021), we get a palindrome (24121412142).

The spelling of 12020210121 in words is "twelve billion, twenty million, two hundred ten thousand, one hundred twenty-one".