1720100124427 has 2 divisors, whose sum is σ = 1720100124428. Its totient is φ = 1720100124426.

The previous prime is 1720100124409. The next prime is 1720100124439. The reversal of 1720100124427 is 7244210010271.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1720100124427 - 2⁷ = 1720100124299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1720100124497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 860050062213 + 860050062214.

It is an arithmetic number, because the mean of its divisors is an integer number (860050062214).

Almost surely, 2^{1720100124427} is an apocalyptic number.

1720100124427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1720100124427 is an equidigital number, since it uses as much as digits as its factorization.

1720100124427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 31.

Adding to 1720100124427 its reverse (7244210010271), we get a palindrome (8964310134698).

The spelling of 1720100124427 in words is "one trillion, seven hundred twenty billion, one hundred million, one hundred twenty-four thousand, four hundred twenty-seven".