12020202021 has 4 divisors (see below), whose sum is σ = 16026936032. Its totient is φ = 8013468012.

The previous prime is 12020202011. The next prime is 12020202031.

12020202021 is nontrivially palindromic in base 10.

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 an interprime number because it is at equal distance from previous prime (12020202011) and next prime (12020202031).

It is not a de Polignac number, because 12020202021 - 2⁶ = 12020201957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020201988 and 12020202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020202011) 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, 2003367001 + ... + 2003367006.

It is an arithmetic number, because the mean of its divisors is an integer number (4006734008).

Almost surely, 2^12020202021 is an apocalyptic number.

It is an amenable number.

12020202021 is a deficient number, since it is larger than the sum of its proper divisors (4006734011).

12020202021 is an equidigital number, since it uses as much as digits as its factorization.

12020202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006734010.

The product of its (nonzero) digits is 32, while the sum is 12.

The spelling of 12020202021 in words is "twelve billion, twenty million, two hundred two thousand, twenty-one".