1001550661101 has 6 divisors (see below), whose sum is σ = 1446684288270. Its totient is φ = 667700440728.

The previous prime is 1001550661093. The next prime is 1001550661109. The reversal of 1001550661101 is 1011660551001.

1001550661101 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 550 + 6 + 6 + 1 + 101 = 666.

It is an interprime number because it is at equal distance from previous prime (1001550661093) and next prime (1001550661109).

It can be written as a sum of positive squares in only one way, i.e., 667732488201 + 333818172900 = 817149^2 + 577770^2 .

It is not a de Polignac number, because 1001550661101 - 2³ = 1001550661093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001550661109) 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 in 5 ways as a sum of consecutive naturals, for example, 55641703386 + ... + 55641703403.

It is an arithmetic number, because the mean of its divisors is an integer number (241114048045).

Almost surely, 2^{1001550661101} is an apocalyptic number.

It is an amenable number.

1001550661101 is a deficient number, since it is larger than the sum of its proper divisors (445133627169).

1001550661101 is a wasteful number, since it uses less digits than its factorization.

1001550661101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111283406795 (or 111283406792 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The spelling of 1001550661101 in words is "one trillion, one billion, five hundred fifty million, six hundred sixty-one thousand, one hundred one".