100002021811 has 2 divisors, whose sum is σ = 100002021812. Its totient is φ = 100002021810.

The previous prime is 100002021799. The next prime is 100002021859. The reversal of 100002021811 is 118120200001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100002021811 - 2¹¹ = 100002019763 is a prime.

It is not a weakly prime, because it can be changed into another prime (100002021881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50001010905 + 50001010906.

It is an arithmetic number, because the mean of its divisors is an integer number (50001010906).

Almost surely, 2^100002021811 is an apocalyptic number.

100002021811 is a deficient number, since it is larger than the sum of its proper divisors (1).

100002021811 is an equidigital number, since it uses as much as digits as its factorization.

100002021811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 100002021811 its reverse (118120200001), we get a palindrome (218122221812).

The spelling of 100002021811 in words is "one hundred billion, two million, twenty-one thousand, eight hundred eleven".