12020020210121 has 32 divisors (see below), whose sum is σ = 15126302853120. Its totient is φ = 9356051065680.

The previous prime is 12020020210111. The next prime is 12020020210139. The reversal of 12020020210121 is 12101202002021.

It is a de Polignac number, because none of the positive numbers 2^k-12020020210121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020020210096 and 12020020210105.

It is not an unprimeable number, because it can be changed into a prime (12020020210111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7860410 + ... + 9264236.

It is an arithmetic number, because the mean of its divisors is an integer number (472696964160).

Almost surely, 2^{12020020210121} is an apocalyptic number.

12020020210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12020020210121 is a deficient number, since it is larger than the sum of its proper divisors (3106282642999).

12020020210121 is an equidigital number, since it uses as much as digits as its factorization.

12020020210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404786 (or 1404764 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12020020210121 its reverse (12101202002021), we get a palindrome (24121222212142).

The spelling of 12020020210121 in words is "twelve trillion, twenty billion, twenty million, two hundred ten thousand, one hundred twenty-one".