100331232091 has 2 divisors, whose sum is σ = 100331232092. Its totient is φ = 100331232090.

The previous prime is 100331232083. The next prime is 100331232121. The reversal of 100331232091 is 190232133001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100331232091 - 2³ = 100331232083 is a prime.

It is a super-2 number, since 2×100331232091² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100331232011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50165616045 + 50165616046.

It is an arithmetic number, because the mean of its divisors is an integer number (50165616046).

Almost surely, 2^100331232091 is an apocalyptic number.

100331232091 is a deficient number, since it is larger than the sum of its proper divisors (1).

100331232091 is an equidigital number, since it uses as much as digits as its factorization.

100331232091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 100331232091 its reverse (190232133001), we get a palindrome (290563365092).

The spelling of 100331232091 in words is "one hundred billion, three hundred thirty-one million, two hundred thirty-two thousand, ninety-one".