2021022021121 has 16 divisors (see below), whose sum is σ = 2152427256000. Its totient is φ = 1892190456000.

The previous prime is 2021022021103. The next prime is 2021022021127. The reversal of 2021022021121 is 1211202201202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2021022021121 - 2⁵ = 2021022021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021022021095 and 2021022021104.

It is not an unprimeable number, because it can be changed into a prime (2021022021127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64830 + ... + 2011528.

It is an arithmetic number, because the mean of its divisors is an integer number (134526703500).

Almost surely, 2^{2021022021121} is an apocalyptic number.

It is an amenable number.

2021022021121 is a deficient number, since it is larger than the sum of its proper divisors (131405234879).

2021022021121 is a wasteful number, since it uses less digits than its factorization.

2021022021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947360.

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

Adding to 2021022021121 its reverse (1211202201202), we get a palindrome (3232224222323).

The spelling of 2021022021121 in words is "two trillion, twenty-one billion, twenty-two million, twenty-one thousand, one hundred twenty-one".