2144312692721 has 2 divisors, whose sum is σ = 2144312692722. Its totient is φ = 2144312692720.

The previous prime is 2144312692661. The next prime is 2144312692723. The reversal of 2144312692721 is 1272962134412.

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., 1533414132721 + 610898560000 = 1238311^2 + 781600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144312692721 - 2¹⁸ = 2144312430577 is a prime.

Together with 2144312692723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2144312692723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072156346360 + 1072156346361.

It is an arithmetic number, because the mean of its divisors is an integer number (1072156346361).

Almost surely, 2^{2144312692721} is an apocalyptic number.

It is an amenable number.

2144312692721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144312692721 is an equidigital number, since it uses as much as digits as its factorization.

2144312692721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 44.

The spelling of 2144312692721 in words is "two trillion, one hundred forty-four billion, three hundred twelve million, six hundred ninety-two thousand, seven hundred twenty-one".