100012103021 has 4 divisors (see below), whose sum is σ = 100012762752. Its totient is φ = 100011443292.

The previous prime is 100012103017. The next prime is 100012103027. The reversal of 100012103021 is 120301210001.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 100012103021 - 2² = 100012103017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100012102993 and 100012103011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100012103027) 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, 24230 + ... + 447896.

It is an arithmetic number, because the mean of its divisors is an integer number (25003190688).

Almost surely, 2^100012103021 is an apocalyptic number.

It is an amenable number.

100012103021 is a deficient number, since it is larger than the sum of its proper divisors (659731).

100012103021 is an equidigital number, since it uses as much as digits as its factorization.

100012103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659730.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 100012103021 its reverse (120301210001), we get a palindrome (220313313022).

The spelling of 100012103021 in words is "one hundred billion, twelve million, one hundred three thousand, twenty-one".