100661217011 has 4 divisors (see below), whose sum is σ = 100662437400. Its totient is φ = 100659996624.

The previous prime is 100661216989. The next prime is 100661217049. The reversal of 100661217011 is 110712166001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100661217011 is a prime.

It is a super-2 number, since 2×100661217011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100661217061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476741 + ... + 654678.

It is an arithmetic number, because the mean of its divisors is an integer number (25165609350).

Almost surely, 2^100661217011 is an apocalyptic number.

100661217011 is a deficient number, since it is larger than the sum of its proper divisors (1220389).

100661217011 is an equidigital number, since it uses as much as digits as its factorization.

100661217011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220388.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 100661217011 in words is "one hundred billion, six hundred sixty-one million, two hundred seventeen thousand, eleven".