2121330213231 has 8 divisors (see below), whose sum is σ = 2828497027200. Its totient is φ = 1414191770712.

The previous prime is 2121330213109. The next prime is 2121330213241. The reversal of 2121330213231 is 1323120331212.

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

It is not a de Polignac number, because 2121330213231 - 2²² = 2121326018927 is a prime.

It is a super-2 number, since 2×2121330213231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121330213241) 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, 6917781 + ... + 7217918.

It is an arithmetic number, because the mean of its divisors is an integer number (353562128400).

Almost surely, 2^{2121330213231} is an apocalyptic number.

2121330213231 is a deficient number, since it is larger than the sum of its proper divisors (707166813969).

2121330213231 is a wasteful number, since it uses less digits than its factorization.

2121330213231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14185725.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 2121330213231 its reverse (1323120331212), we get a palindrome (3444450544443).

The spelling of 2121330213231 in words is "two trillion, one hundred twenty-one billion, three hundred thirty million, two hundred thirteen thousand, two hundred thirty-one".