8821977121 has 2 divisors, whose sum is σ = 8821977122. Its totient is φ = 8821977120.

The previous prime is 8821977119. The next prime is 8821977133. The reversal of 8821977121 is 1217791288.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6361817121 + 2460160000 = 79761^2 + 49600^2 .

It is a cyclic number.

It is not a de Polignac number, because 8821977121 - 2¹ = 8821977119 is a prime.

Together with 8821977119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8821977181) 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, 4410988560 + 4410988561.

It is an arithmetic number, because the mean of its divisors is an integer number (4410988561).

Almost surely, 2^8821977121 is an apocalyptic number.

It is an amenable number.

8821977121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8821977121 is an equidigital number, since it uses as much as digits as its factorization.

8821977121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 46.

The square root of 8821977121 is about 93925.3806007727. The cubic root of 8821977121 is about 2066.2774798044.

The spelling of 8821977121 in words is "eight billion, eight hundred twenty-one million, nine hundred seventy-seven thousand, one hundred twenty-one".