2121332121331 has 4 divisors (see below), whose sum is σ = 2121737502472. Its totient is φ = 2120926740192.

The previous prime is 2121332121301. The next prime is 2121332121379. The reversal of 2121332121331 is 1331212331212.

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 2121332121331 - 2¹³ = 2121332113139 is a prime.

It is a super-2 number, since 2×2121332121331² (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 = 2121332121296 and 2121332121305.

It is not an unprimeable number, because it can be changed into a prime (2121332121301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202682721 + ... + 202693186.

It is an arithmetic number, because the mean of its divisors is an integer number (530434375618).

Almost surely, 2^{2121332121331} is an apocalyptic number.

2121332121331 is a deficient number, since it is larger than the sum of its proper divisors (405381141).

2121332121331 is an equidigital number, since it uses as much as digits as its factorization.

2121332121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405381140.

The product of its digits is 1296, while the sum is 25.

Adding to 2121332121331 its reverse (1331212331212), we get a palindrome (3452544452543).

The spelling of 2121332121331 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-two million, one hundred twenty-one thousand, three hundred thirty-one".