2121322124309 has 2 divisors, whose sum is σ = 2121322124310. Its totient is φ = 2121322124308.

The previous prime is 2121322124303. The next prime is 2121322124351. The reversal of 2121322124309 is 9034212231212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2093157900625 + 28164223684 = 1446775^2 + 167822^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121322124309 - 2⁴⁰ = 1021810496533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121322124303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060661062154 + 1060661062155.

It is an arithmetic number, because the mean of its divisors is an integer number (1060661062155).

Almost surely, 2^{2121322124309} is an apocalyptic number.

It is an amenable number.

2121322124309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121322124309 is an equidigital number, since it uses as much as digits as its factorization.

2121322124309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 2121322124309 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-two million, one hundred twenty-four thousand, three hundred nine".