100112312021 has 2 divisors, whose sum is σ = 100112312022. Its totient is φ = 100112312020.

The previous prime is 100112312017. The next prime is 100112312033. The reversal of 100112312021 is 120213211001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95333355121 + 4778956900 = 308761^2 + 69130^2 .

It is a cyclic number.

It is not a de Polignac number, because 100112312021 - 2² = 100112312017 is a prime.

It is a super-2 number, since 2×100112312021² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100112311987 and 100112312005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100112312821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50056156010 + 50056156011.

It is an arithmetic number, because the mean of its divisors is an integer number (50056156011).

Almost surely, 2^100112312021 is an apocalyptic number.

It is an amenable number.

100112312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100112312021 is an equidigital number, since it uses as much as digits as its factorization.

100112312021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 100112312021 its reverse (120213211001), we get a palindrome (220325523022).

The spelling of 100112312021 in words is "one hundred billion, one hundred twelve million, three hundred twelve thousand, twenty-one".