2121002333231 has 4 divisors (see below), whose sum is σ = 2232634035000. Its totient is φ = 2009370631464.

The previous prime is 2121002333213. The next prime is 2121002333243. The reversal of 2121002333231 is 1323332001212.

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 2121002333231 - 2⁶ = 2121002333167 is a prime.

It is a super-2 number, since 2×2121002333231² (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 = 2121002333197 and 2121002333206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121002333731) 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, 55815850856 + ... + 55815850893.

It is an arithmetic number, because the mean of its divisors is an integer number (558158508750).

Almost surely, 2^{2121002333231} is an apocalyptic number.

2121002333231 is a deficient number, since it is larger than the sum of its proper divisors (111631701769).

2121002333231 is a wasteful number, since it uses less digits than its factorization.

2121002333231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111631701768.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 2121002333231 its reverse (1323332001212), we get a palindrome (3444334334443).

The spelling of 2121002333231 in words is "two trillion, one hundred twenty-one billion, two million, three hundred thirty-three thousand, two hundred thirty-one".