2131724968073 has 2 divisors, whose sum is σ = 2131724968074. Its totient is φ = 2131724968072.

The previous prime is 2131724968067. The next prime is 2131724968097. The reversal of 2131724968073 is 3708694271312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1733427660409 + 398297307664 = 1316597^2 + 631108^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131724968073 - 2⁴ = 2131724968057 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131724968673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065862484036 + 1065862484037.

It is an arithmetic number, because the mean of its divisors is an integer number (1065862484037).

Almost surely, 2^{2131724968073} is an apocalyptic number.

It is an amenable number.

2131724968073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131724968073 is an equidigital number, since it uses as much as digits as its factorization.

2131724968073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 2131724968073 in words is "two trillion, one hundred thirty-one billion, seven hundred twenty-four million, nine hundred sixty-eight thousand, seventy-three".