12020001012121 has 4 divisors (see below), whose sum is σ = 12028793991552. Its totient is φ = 12011208032692.

The previous prime is 12020001012101. The next prime is 12020001012133. The reversal of 12020001012121 is 12121010002021.

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 a cyclic number.

It is not a de Polignac number, because 12020001012121 - 2¹³ = 12020001003929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020001012101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4396487665 + ... + 4396490398.

It is an arithmetic number, because the mean of its divisors is an integer number (3007198497888).

Almost surely, 2^{12020001012121} is an apocalyptic number.

It is an amenable number.

12020001012121 is a deficient number, since it is larger than the sum of its proper divisors (8792979431).

12020001012121 is an equidigital number, since it uses as much as digits as its factorization.

12020001012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792979430.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12020001012121 its reverse (12121010002021), we get a palindrome (24141011014142).

The spelling of 12020001012121 in words is "twelve trillion, twenty billion, one million, twelve thousand, one hundred twenty-one".