100110122821 has 2 divisors, whose sum is σ = 100110122822. Its totient is φ = 100110122820.

The previous prime is 100110122807. The next prime is 100110122843. The reversal of 100110122821 is 128221011001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99168308100 + 941814721 = 314910^2 + 30689^2 .

It is a cyclic number.

It is not a de Polignac number, because 100110122821 - 2²⁹ = 99573251909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100110122891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50055061410 + 50055061411.

It is an arithmetic number, because the mean of its divisors is an integer number (50055061411).

Almost surely, 2^100110122821 is an apocalyptic number.

It is an amenable number.

100110122821 is a deficient number, since it is larger than the sum of its proper divisors (1).

100110122821 is an equidigital number, since it uses as much as digits as its factorization.

100110122821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 100110122821 its reverse (128221011001), we get a palindrome (228331133822).

The spelling of 100110122821 in words is "one hundred billion, one hundred ten million, one hundred twenty-two thousand, eight hundred twenty-one".