100021221071 has 2 divisors, whose sum is σ = 100021221072. Its totient is φ = 100021221070.

The previous prime is 100021221017. The next prime is 100021221077. The reversal of 100021221071 is 170122120001.

Together with previous prime (100021221017) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (170122120001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100021221071 - 2¹⁸ = 100020958927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021221077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010610535 + 50010610536.

It is an arithmetic number, because the mean of its divisors is an integer number (50010610536).

Almost surely, 2^100021221071 is an apocalyptic number.

100021221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021221071 is an equidigital number, since it uses as much as digits as its factorization.

100021221071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 100021221071 its reverse (170122120001), we get a palindrome (270143341072).

The spelling of 100021221071 in words is "one hundred billion, twenty-one million, two hundred twenty-one thousand, seventy-one".