2120911909313 has 2 divisors, whose sum is σ = 2120911909314. Its totient is φ = 2120911909312.

The previous prime is 2120911909157. The next prime is 2120911909331. The reversal of 2120911909313 is 3139091190212.

Together with next prime (2120911909331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1236048097729 + 884863811584 = 1111777^2 + 940672^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120911909313 - 2¹⁶ = 2120911843777 is a prime.

It is a super-2 number, since 2×2120911909313² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2120911909013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060455954656 + 1060455954657.

It is an arithmetic number, because the mean of its divisors is an integer number (1060455954657).

Almost surely, 2^{2120911909313} is an apocalyptic number.

It is an amenable number.

2120911909313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120911909313 is an equidigital number, since it uses as much as digits as its factorization.

2120911909313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The spelling of 2120911909313 in words is "two trillion, one hundred twenty billion, nine hundred eleven million, nine hundred nine thousand, three hundred thirteen".