172120750001 has 4 divisors (see below), whose sum is σ = 172178842992. Its totient is φ = 172062657012.

The previous prime is 172120749991. The next prime is 172120750007. The reversal of 172120750001 is 100057021271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 172120750001 - 2¹⁸ = 172120487857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172120750007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29042051 + ... + 29047976.

It is an arithmetic number, because the mean of its divisors is an integer number (43044710748).

Almost surely, 2^172120750001 is an apocalyptic number.

It is an amenable number.

172120750001 is a deficient number, since it is larger than the sum of its proper divisors (58092991).

172120750001 is an equidigital number, since it uses as much as digits as its factorization.

172120750001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58092990.

The product of its (nonzero) digits is 980, while the sum is 26.

Adding to 172120750001 its reverse (100057021271), we get a palindrome (272177771272).

The spelling of 172120750001 in words is "one hundred seventy-two billion, one hundred twenty million, seven hundred fifty thousand, one".