2021122011121 has 16 divisors (see below), whose sum is σ = 2070019340928. Its totient is φ = 1972948032000.

The previous prime is 2021122011109. The next prime is 2021122011151. The reversal of 2021122011121 is 1211102211202.

It is a cyclic number.

It is not a de Polignac number, because 2021122011121 - 2¹⁵ = 2021121978353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021122011095 and 2021122011104.

It is not an unprimeable number, because it can be changed into a prime (2021122011101) 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, 2184406 + ... + 2968816.

It is an arithmetic number, because the mean of its divisors is an integer number (129376208808).

Almost surely, 2^{2021122011121} is an apocalyptic number.

It is an amenable number.

2021122011121 is a deficient number, since it is larger than the sum of its proper divisors (48897329807).

2021122011121 is a wasteful number, since it uses less digits than its factorization.

2021122011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784872.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2021122011121 its reverse (1211102211202), we get a palindrome (3232224222323).

The spelling of 2021122011121 in words is "two trillion, twenty-one billion, one hundred twenty-two million, eleven thousand, one hundred twenty-one".