2130121331309 has 2 divisors, whose sum is σ = 2130121331310. Its totient is φ = 2130121331308.

The previous prime is 2130121331263. The next prime is 2130121331353. The reversal of 2130121331309 is 9031331210312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1529666819209 + 600454512100 = 1236797^2 + 774890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130121331309 - 2⁴⁰ = 1030609703533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130121331389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065060665654 + 1065060665655.

It is an arithmetic number, because the mean of its divisors is an integer number (1065060665655).

Almost surely, 2^{2130121331309} is an apocalyptic number.

It is an amenable number.

2130121331309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130121331309 is an equidigital number, since it uses as much as digits as its factorization.

2130121331309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The spelling of 2130121331309 in words is "two trillion, one hundred thirty billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred nine".