2121320312341 has 2 divisors, whose sum is σ = 2121320312342. Its totient is φ = 2121320312340.

The previous prime is 2121320312299. The next prime is 2121320312389. The reversal of 2121320312341 is 1432130231212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1485985380100 + 635334932241 = 1219010^2 + 797079^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121320312341 - 2¹³ = 2121320304149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121320312941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060660156170 + 1060660156171.

It is an arithmetic number, because the mean of its divisors is an integer number (1060660156171).

Almost surely, 2^{2121320312341} is an apocalyptic number.

It is an amenable number.

2121320312341 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121320312341 is an equidigital number, since it uses as much as digits as its factorization.

2121320312341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 2121320312341 its reverse (1432130231212), we get a palindrome (3553450543553).

The spelling of 2121320312341 in words is "two trillion, one hundred twenty-one billion, three hundred twenty million, three hundred twelve thousand, three hundred forty-one".