2121233021231 has 8 divisors (see below), whose sum is σ = 2166386321664. Its totient is φ = 2076080582680.

The previous prime is 2121233021197. The next prime is 2121233021233. The reversal of 2121233021231 is 1321203321212.

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 2121233021231 - 2²⁶ = 2121165912367 is a prime.

It is a super-2 number, since 2×2121233021231² (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 = 2121233021197 and 2121233021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121233021233) 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, 8315696 + ... + 8566986.

It is an arithmetic number, because the mean of its divisors is an integer number (270798290208).

Almost surely, 2^{2121233021231} is an apocalyptic number.

2121233021231 is a deficient number, since it is larger than the sum of its proper divisors (45153300433).

2121233021231 is a wasteful number, since it uses less digits than its factorization.

2121233021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430941.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2121233021231 its reverse (1321203321212), we get a palindrome (3442436342443).

The spelling of 2121233021231 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-three million, twenty-one thousand, two hundred thirty-one".