2021122011221 has 8 divisors (see below), whose sum is σ = 2021654177088. Its totient is φ = 2020589928000.

The previous prime is 2021122011217. The next prime is 2021122011239. The reversal of 2021122011221 is 1221102211202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021122011221 - 2² = 2021122011217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021122011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021122011421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112456766 + ... + 112474736.

It is an arithmetic number, because the mean of its divisors is an integer number (252706772136).

Almost surely, 2^{2021122011221} is an apocalyptic number.

It is an amenable number.

2021122011221 is a deficient number, since it is larger than the sum of its proper divisors (532165867).

2021122011221 is a wasteful number, since it uses less digits than its factorization.

2021122011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41323.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2021122011221 its reverse (1221102211202), we get a palindrome (3242224222423).

The spelling of 2021122011221 in words is "two trillion, twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".