100440021191 has 2 divisors, whose sum is σ = 100440021192. Its totient is φ = 100440021190.

The previous prime is 100440021139. The next prime is 100440021239. The reversal of 100440021191 is 191120044001.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100440021191 is a prime.

It is a super-3 number, since 3×100440021191³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100440021091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50220010595 + 50220010596.

It is an arithmetic number, because the mean of its divisors is an integer number (50220010596).

Almost surely, 2^100440021191 is an apocalyptic number.

100440021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

100440021191 is an equidigital number, since it uses as much as digits as its factorization.

100440021191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 100440021191 its reverse (191120044001), we get a palindrome (291560065192).

The spelling of 100440021191 in words is "one hundred billion, four hundred forty million, twenty-one thousand, one hundred ninety-one".