101212889 has 2 divisors, whose sum is σ = 101212890. Its totient is φ = 101212888.

The previous prime is 101212877. The next prime is 101212913. The reversal of 101212889 is 988212101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56550400 + 44662489 = 7520^2 + 6683^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212889 - 2⁴ = 101212873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101212819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606444 + 50606445.

It is an arithmetic number, because the mean of its divisors is an integer number (50606445).

Almost surely, 2^101212889 is an apocalyptic number.

It is an amenable number.

101212889 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212889 is an equidigital number, since it uses as much as digits as its factorization.

101212889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 101212889 is about 10060.4616693271. The cubic root of 101212889 is about 466.0279244872.

The spelling of 101212889 in words is "one hundred one million, two hundred twelve thousand, eight hundred eighty-nine".