501212112001 has 4 divisors (see below), whose sum is σ = 505158664192. Its totient is φ = 497265559812.

The previous prime is 501212111999. The next prime is 501212112007. The reversal of 501212112001 is 100211212105.

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 501212112001 - 2¹ = 501212111999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501212112007) 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, 1973275905 + ... + 1973276158.

It is an arithmetic number, because the mean of its divisors is an integer number (126289666048).

Almost surely, 2^501212112001 is an apocalyptic number.

It is an amenable number.

501212112001 is a deficient number, since it is larger than the sum of its proper divisors (3946552191).

501212112001 is a wasteful number, since it uses less digits than its factorization.

501212112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946552190.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 501212112001 its reverse (100211212105), we get a palindrome (601423324106).

The spelling of 501212112001 in words is "five hundred one billion, two hundred twelve million, one hundred twelve thousand, one".