100100331661 has 4 divisors (see below), whose sum is σ = 109200361824. Its totient is φ = 91000301500.

The previous prime is 100100331649. The next prime is 100100331673. The reversal of 100100331661 is 166133001001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (100100331649) and next prime (100100331673).

It is a cyclic number.

It is not a de Polignac number, because 100100331661 - 2⁵ = 100100331629 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100100331631) 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, 4550015065 + ... + 4550015086.

It is an arithmetic number, because the mean of its divisors is an integer number (27300090456).

Almost surely, 2^100100331661 is an apocalyptic number.

100100331661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100100331661 is a deficient number, since it is larger than the sum of its proper divisors (9100030163).

100100331661 is an equidigital number, since it uses as much as digits as its factorization.

100100331661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100030162.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 100100331661 its reverse (166133001001), we get a palindrome (266233332662).

The spelling of 100100331661 in words is "one hundred billion, one hundred million, three hundred thirty-one thousand, six hundred sixty-one".