2021123130221 has 8 divisors (see below), whose sum is σ = 2202818167200. Its totient is φ = 1843174382832.

The previous prime is 2021123130217. The next prime is 2021123130263. The reversal of 2021123130221 is 1220313211202.

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 2021123130221 - 2² = 2021123130217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021123130193 and 2021123130202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021123130211) 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, 936571271 + ... + 936573428.

It is an arithmetic number, because the mean of its divisors is an integer number (275352270900).

Almost surely, 2^{2021123130221} is an apocalyptic number.

It is an amenable number.

2021123130221 is a deficient number, since it is larger than the sum of its proper divisors (181695036979).

2021123130221 is a wasteful number, since it uses less digits than its factorization.

2021123130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873144795.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2021123130221 its reverse (1220313211202), we get a palindrome (3241436341423).

It can be divided in two parts, 202112 and 3130221, that added together give a palindrome (3332333).

The spelling of 2021123130221 in words is "two trillion, twenty-one billion, one hundred twenty-three million, one hundred thirty thousand, two hundred twenty-one".