100221211012171 has 2 divisors, whose sum is σ = 100221211012172. Its totient is φ = 100221211012170.

The previous prime is 100221211012151. The next prime is 100221211012211. The reversal of 100221211012171 is 171210112122001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100221211012171 - 2¹⁵ = 100221210979403 is a prime.

It is a super-2 number, since 2×100221211012171² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100221211012151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110605506085 + 50110605506086.

It is an arithmetic number, because the mean of its divisors is an integer number (50110605506086).

Almost surely, 2^{100221211012171} is an apocalyptic number.

100221211012171 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221211012171 is an equidigital number, since it uses as much as digits as its factorization.

100221211012171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 100221211012171 its reverse (171210112122001), we get a palindrome (271431323134172).

The spelling of 100221211012171 in words is "one hundred trillion, two hundred twenty-one billion, two hundred eleven million, twelve thousand, one hundred seventy-one".