1000212121177 has 2 divisors, whose sum is σ = 1000212121178. Its totient is φ = 1000212121176.

The previous prime is 1000212121169. The next prime is 1000212121189. The reversal of 1000212121177 is 7711212120001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 870225913881 + 129986207296 = 932859^2 + 360536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000212121177 - 2³ = 1000212121169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000212121577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500106060588 + 500106060589.

It is an arithmetic number, because the mean of its divisors is an integer number (500106060589).

Almost surely, 2^{1000212121177} is an apocalyptic number.

It is an amenable number.

1000212121177 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000212121177 is an equidigital number, since it uses as much as digits as its factorization.

1000212121177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 25.

Adding to 1000212121177 its reverse (7711212120001), we get a palindrome (8711424241178).

The spelling of 1000212121177 in words is "one trillion, two hundred twelve million, one hundred twenty-one thousand, one hundred seventy-seven".