100021112171 has 2 divisors, whose sum is σ = 100021112172. Its totient is φ = 100021112170.

The previous prime is 100021112131. The next prime is 100021112227. The reversal of 100021112171 is 171211120001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100021112171 - 2²⁶ = 99954003307 is a prime.

It is not a weakly prime, because it can be changed into another prime (100021112111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010556085 + 50010556086.

It is an arithmetic number, because the mean of its divisors is an integer number (50010556086).

Almost surely, 2^100021112171 is an apocalyptic number.

100021112171 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021112171 is an equidigital number, since it uses as much as digits as its factorization.

100021112171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 100021112171 its reverse (171211120001), we get a palindrome (271232232172).

The spelling of 100021112171 in words is "one hundred billion, twenty-one million, one hundred twelve thousand, one hundred seventy-one".