12020020202121 has 32 divisors (see below), whose sum is σ = 16263484248960. Its totient is φ = 7895830953984.

The previous prime is 12020020202117. The next prime is 12020020202129. The reversal of 12020020202121 is 12120202002021.

It is not a de Polignac number, because 12020020202121 - 2² = 12020020202117 is a prime.

It is a super-3 number, since 3×12020020202121³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12020020202121.

It is not an unprimeable number, because it can be changed into a prime (12020020202129) 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 31 ways as a sum of consecutive naturals, for example, 69396201 + ... + 69569193.

It is an arithmetic number, because the mean of its divisors is an integer number (508233882780).

Almost surely, 2^{12020020202121} is an apocalyptic number.

It is an amenable number.

12020020202121 is a deficient number, since it is larger than the sum of its proper divisors (4243464046839).

12020020202121 is a wasteful number, since it uses less digits than its factorization.

12020020202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174265.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12020020202121 its reverse (12120202002021), we get a palindrome (24140222204142).

The spelling of 12020020202121 in words is "twelve trillion, twenty billion, twenty million, two hundred two thousand, one hundred twenty-one".