2122121121021 has 24 divisors (see below), whose sum is σ = 3352287519360. Its totient is φ = 1282926672000.

The previous prime is 2122121120993. The next prime is 2122121121037. The reversal of 2122121121021 is 1201211212212.

2122121121021 is a `hidden beast` number, since 2 + 1 + 221 + 211 + 210 + 21 = 666.

It is not a de Polignac number, because 2122121121021 - 2⁶ = 2122121120957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2122121120985 and 2122121121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122121121091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26687941 + ... + 26767338.

It is an arithmetic number, because the mean of its divisors is an integer number (139678646640).

Almost surely, 2^{2122121121021} is an apocalyptic number.

It is an amenable number.

2122121121021 is a deficient number, since it is larger than the sum of its proper divisors (1230166398339).

2122121121021 is a wasteful number, since it uses less digits than its factorization.

2122121121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53455697 (or 53455694 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2122121121021 its reverse (1201211212212), we get a palindrome (3323332333233).

The spelling of 2122121121021 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".