110129821 has 2 divisors, whose sum is σ = 110129822. Its totient is φ = 110129820.

The previous prime is 110129807. The next prime is 110129861. The reversal of 110129821 is 128921011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64080025 + 46049796 = 8005^2 + 6786^2 .

It is an emirp because it is prime and its reverse (128921011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110129821 - 2⁹ = 110129309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110129861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55064910 + 55064911.

It is an arithmetic number, because the mean of its divisors is an integer number (55064911).

Almost surely, 2^110129821 is an apocalyptic number.

It is an amenable number.

110129821 is a deficient number, since it is larger than the sum of its proper divisors (1).

110129821 is an equidigital number, since it uses as much as digits as its factorization.

110129821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 110129821 is about 10494.2756300757. The cubic root of 110129821 is about 479.3304046075.

The spelling of 110129821 in words is "one hundred ten million, one hundred twenty-nine thousand, eight hundred twenty-one".