2020201212121 has 16 divisors (see below), whose sum is σ = 2039272962048. Its totient is φ = 2001219696000.

The previous prime is 2020201212109. The next prime is 2020201212181. The reversal of 2020201212121 is 1212121020202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2020201212121 - 2³¹ = 2018053728473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2020201212095 and 2020201212104.

It is not an unprimeable number, because it can be changed into a prime (2020201212101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78972285 + ... + 78997861.

It is an arithmetic number, because the mean of its divisors is an integer number (127454560128).

Almost surely, 2^{2020201212121} is an apocalyptic number.

It is an amenable number.

2020201212121 is a deficient number, since it is larger than the sum of its proper divisors (19071749927).

2020201212121 is a wasteful number, since it uses less digits than its factorization.

2020201212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27312.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2020201212121 its reverse (1212121020202), we get a palindrome (3232322232323).

It can be divided in two parts, 2020201 and 212121, that added together give a palindrome (2232322).

The spelling of 2020201212121 in words is "two trillion, twenty billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".