10001555101217 has 2 divisors, whose sum is σ = 10001555101218. Its totient is φ = 10001555101216.

The previous prime is 10001555101211. The next prime is 10001555101259. The reversal of 10001555101217 is 71210155510001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8685374833216 + 1316180268001 = 2947096^2 + 1147249^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001555101217 - 2⁴⁰ = 8902043473441 is a prime.

It is a super-2 number, since 2×10001555101217² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10001555101217.

It is not a weakly prime, because it can be changed into another prime (10001555101211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000777550608 + 5000777550609.

It is an arithmetic number, because the mean of its divisors is an integer number (5000777550609).

Almost surely, 2^{10001555101217} is an apocalyptic number.

It is an amenable number.

10001555101217 is a deficient number, since it is larger than the sum of its proper divisors (1).

10001555101217 is an equidigital number, since it uses as much as digits as its factorization.

10001555101217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1750, while the sum is 29.

The spelling of 10001555101217 in words is "ten trillion, one billion, five hundred fifty-five million, one hundred one thousand, two hundred seventeen".