12020021212121 has 32 divisors (see below), whose sum is σ = 13086636853248. Its totient is φ = 10974510120960.

The previous prime is 12020021212109. The next prime is 12020021212169. The reversal of 12020021212121 is 12121212002021.

12020021212121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12020021212121 - 2³⁸ = 11745143305177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12020021212121.

It is not an unprimeable number, because it can be changed into a prime (12020021212421) 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, 359251025 + ... + 359284481.

It is an arithmetic number, because the mean of its divisors is an integer number (408957401664).

Almost surely, 2^{12020021212121} is an apocalyptic number.

It is an amenable number.

12020021212121 is a deficient number, since it is larger than the sum of its proper divisors (1066615641127).

12020021212121 is a wasteful number, since it uses less digits than its factorization.

12020021212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34481.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12020021212121 its reverse (12121212002021), we get a palindrome (24141233214142).

The spelling of 12020021212121 in words is "twelve trillion, twenty billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".