100512050021 has 16 divisors (see below), whose sum is σ = 101888115840. Its totient is φ = 99148134720.

The previous prime is 100512049999. The next prime is 100512050029. The reversal of 100512050021 is 120050215001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100512050021 is a prime.

It is a super-2 number, since 2×100512050021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100512050029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12118886 + ... + 12127176.

It is an arithmetic number, because the mean of its divisors is an integer number (6368007240).

Almost surely, 2^100512050021 is an apocalyptic number.

It is an amenable number.

100512050021 is a deficient number, since it is larger than the sum of its proper divisors (1376065819).

100512050021 is a wasteful number, since it uses less digits than its factorization.

100512050021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9004.

The product of its (nonzero) digits is 100, while the sum is 17.

Adding to 100512050021 its reverse (120050215001), we get a palindrome (220562265022).

The spelling of 100512050021 in words is "one hundred billion, five hundred twelve million, fifty thousand, twenty-one".