101009091 has 8 divisors (see below), whose sum is σ = 136301760. Its totient is φ = 66527912.

The previous prime is 101009057. The next prime is 101009137. The reversal of 101009091 is 190900101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101009091 - 2²² = 96814787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101009791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202581 + ... + 203078.

It is an arithmetic number, because the mean of its divisors is an integer number (17037720).

Almost surely, 2^101009091 is an apocalyptic number.

101009091 is a deficient number, since it is larger than the sum of its proper divisors (35292669).

101009091 is an equidigital number, since it uses as much as digits as its factorization.

101009091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405745.

The product of its (nonzero) digits is 81, while the sum is 21.

The square root of 101009091 is about 10050.3279050984. The cubic root of 101009091 is about 465.7149229267.

Adding to 101009091 its reverse (190900101), we get a palindrome (291909192).

It can be divided in two parts, 10100 and 9091, that added together give a palindrome (19191).

The spelling of 101009091 in words is "one hundred one million, nine thousand, ninety-one".