2020021211121 has 16 divisors (see below), whose sum is σ = 2759510410560. Its totient is φ = 1313890310720.

The previous prime is 2020021211113. The next prime is 2020021211141. The reversal of 2020021211121 is 1211121200202.

It is a cyclic number.

It is not a de Polignac number, because 2020021211121 - 2³ = 2020021211113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2020021211121.

It is not an unprimeable number, because it can be changed into a prime (2020021211141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35459070 + ... + 35515991.

It is an arithmetic number, because the mean of its divisors is an integer number (172469400660).

Almost surely, 2^{2020021211121} is an apocalyptic number.

It is an amenable number.

2020021211121 is a deficient number, since it is larger than the sum of its proper divisors (739489199439).

2020021211121 is a wasteful number, since it uses less digits than its factorization.

2020021211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70975296.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2020021211121 its reverse (1211121200202), we get a palindrome (3231142411323).

The spelling of 2020021211121 in words is "two trillion, twenty billion, twenty-one million, two hundred eleven thousand, one hundred twenty-one".