10212117977 has 2 divisors, whose sum is σ = 10212117978. Its totient is φ = 10212117976.

The previous prime is 10212117947. The next prime is 10212117983. The reversal of 10212117977 is 77971121201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8241734656 + 1970383321 = 90784^2 + 44389^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212117977 - 2¹⁴ = 10212101593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10212117977.

It is not a weakly prime, because it can be changed into another prime (10212117947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106058988 + 5106058989.

It is an arithmetic number, because the mean of its divisors is an integer number (5106058989).

Almost surely, 2^10212117977 is an apocalyptic number.

It is an amenable number.

10212117977 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212117977 is an equidigital number, since it uses as much as digits as its factorization.

10212117977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12348, while the sum is 38.

The spelling of 10212117977 in words is "ten billion, two hundred twelve million, one hundred seventeen thousand, nine hundred seventy-seven".