8544942121 has 2 divisors, whose sum is σ = 8544942122. Its totient is φ = 8544942120.

The previous prime is 8544942089. The next prime is 8544942127. The reversal of 8544942121 is 1212494458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7698132121 + 846810000 = 87739^2 + 29100^2 .

It is a cyclic number.

It is not a de Polignac number, because 8544942121 - 2⁵ = 8544942089 is a prime.

It is not a weakly prime, because it can be changed into another prime (8544942127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4272471060 + 4272471061.

It is an arithmetic number, because the mean of its divisors is an integer number (4272471061).

Almost surely, 2^8544942121 is an apocalyptic number.

It is an amenable number.

8544942121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8544942121 is an equidigital number, since it uses as much as digits as its factorization.

8544942121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 40.

The square root of 8544942121 is about 92438.8561212221. The cubic root of 8544942121 is about 2044.4180585198.

The spelling of 8544942121 in words is "eight billion, five hundred forty-four million, nine hundred forty-two thousand, one hundred twenty-one".