100021001111 has 2 divisors, whose sum is σ = 100021001112. Its totient is φ = 100021001110.

The previous prime is 100021001089. The next prime is 100021001147. The reversal of 100021001111 is 111100120001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100021001111 - 2¹⁸ = 100020738967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100021003111) 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, 50010500555 + 50010500556.

It is an arithmetic number, because the mean of its divisors is an integer number (50010500556).

Almost surely, 2^100021001111 is an apocalyptic number.

100021001111 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021001111 is an equidigital number, since it uses as much as digits as its factorization.

100021001111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 100021001111 its reverse (111100120001), we get a palindrome (211121121112).

The spelling of 100021001111 in words is "one hundred billion, twenty-one million, one thousand, one hundred eleven".