100221012127 has 2 divisors, whose sum is σ = 100221012128. Its totient is φ = 100221012126.

The previous prime is 100221012103. The next prime is 100221012161. The reversal of 100221012127 is 721210122001.

It is a weak prime.

It is an emirp because it is prime and its reverse (721210122001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221012127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100221012197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110506063 + 50110506064.

It is an arithmetic number, because the mean of its divisors is an integer number (50110506064).

Almost surely, 2^100221012127 is an apocalyptic number.

100221012127 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221012127 is an equidigital number, since it uses as much as digits as its factorization.

100221012127 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 19.

Adding to 100221012127 its reverse (721210122001), we get a palindrome (821431134128).

The spelling of 100221012127 in words is "one hundred billion, two hundred twenty-one million, twelve thousand, one hundred twenty-seven".