2121131310233 has 4 divisors (see below), whose sum is σ = 2284295257188. Its totient is φ = 1957967363280.

The previous prime is 2121131310173. The next prime is 2121131310293. The reversal of 2121131310233 is 3320131311212.

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

It is an interprime number because it is at equal distance from previous prime (2121131310173) and next prime (2121131310293).

It can be written as a sum of positive squares in 2 ways, for example, as 1241947538329 + 879183771904 = 1114427^2 + 937648^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121131310233 - 2¹⁴ = 2121131293849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121131310199 and 2121131310208.

It is not an unprimeable number, because it can be changed into a prime (2121131310293) 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, 81581973458 + ... + 81581973483.

It is an arithmetic number, because the mean of its divisors is an integer number (571073814297).

Almost surely, 2^{2121131310233} is an apocalyptic number.

It is an amenable number.

2121131310233 is a deficient number, since it is larger than the sum of its proper divisors (163163946955).

2121131310233 is a wasteful number, since it uses less digits than its factorization.

2121131310233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163163946954.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2121131310233 its reverse (3320131311212), we get a palindrome (5441262621445).

The spelling of 2121131310233 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-one million, three hundred ten thousand, two hundred thirty-three".