2021231201123 has 4 divisors (see below), whose sum is σ = 2021333826600. Its totient is φ = 2021128575648.

The previous prime is 2021231201117. The next prime is 2021231201147. The reversal of 2021231201123 is 3211021321202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2021231201123 - 2¹⁶ = 2021231135587 is a prime.

It is a super-2 number, since 2×2021231201123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021231201095 and 2021231201104.

It is not an unprimeable number, because it can be changed into a prime (2021231201173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51283190 + ... + 51322587.

It is an arithmetic number, because the mean of its divisors is an integer number (505333456650).

Almost surely, 2^{2021231201123} is an apocalyptic number.

2021231201123 is a deficient number, since it is larger than the sum of its proper divisors (102625477).

2021231201123 is a wasteful number, since it uses less digits than its factorization.

2021231201123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102625476.

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

Adding to 2021231201123 its reverse (3211021321202), we get a palindrome (5232252522325).

The spelling of 2021231201123 in words is "two trillion, twenty-one billion, two hundred thirty-one million, two hundred one thousand, one hundred twenty-three".