10001212209977 has 2 divisors, whose sum is σ = 10001212209978. Its totient is φ = 10001212209976.

The previous prime is 10001212209929. The next prime is 10001212210001. The reversal of 10001212209977 is 77990221210001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8620072512016 + 1381139697961 = 2935996^2 + 1175219^2 .

It is an emirp because it is prime and its reverse (77990221210001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10001212209977 - 2¹⁴ = 10001212193593 is a prime.

It is not a weakly prime, because it can be changed into another prime (10001212209577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000606104988 + 5000606104989.

It is an arithmetic number, because the mean of its divisors is an integer number (5000606104989).

Almost surely, 2^{10001212209977} is an apocalyptic number.

It is an amenable number.

10001212209977 is a deficient number, since it is larger than the sum of its proper divisors (1).

10001212209977 is an equidigital number, since it uses as much as digits as its factorization.

10001212209977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

Adding to 10001212209977 its reverse (77990221210001), we get a palindrome (87991433419978).

The spelling of 10001212209977 in words is "ten trillion, one billion, two hundred twelve million, two hundred nine thousand, nine hundred seventy-seven".