1720124011 has 4 divisors (see below), whose sum is σ = 1721125224. Its totient is φ = 1719122800.

The previous prime is 1720123987. The next prime is 1720124057. The reversal of 1720124011 is 1104210271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1720124011 - 2⁹ = 1720123499 is a prime.

It is a super-2 number, since 2×1720124011² = 5917653226437456242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1720124011.

It is not an unprimeable number, because it can be changed into a prime (1720124071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498025 + ... + 501466.

It is an arithmetic number, because the mean of its divisors is an integer number (430281306).

Almost surely, 2^1720124011 is an apocalyptic number.

1720124011 is a deficient number, since it is larger than the sum of its proper divisors (1001213).

1720124011 is an equidigital number, since it uses as much as digits as its factorization.

1720124011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001212.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1720124011 is about 41474.3777650732. The cubic root of 1720124011 is about 1198.1740774798.

Adding to 1720124011 its reverse (1104210271), we get a palindrome (2824334282).

The spelling of 1720124011 in words is "one billion, seven hundred twenty million, one hundred twenty-four thousand, eleven".