100122120091 has 16 divisors (see below), whose sum is σ = 116822745088. Its totient is φ = 84033482400.

The previous prime is 100122120047. The next prime is 100122120097. The reversal of 100122120091 is 190021221001.

It is a happy number.

It is not a de Polignac number, because 100122120091 - 2⁷ = 100122119963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100122120097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430515 + ... + 620956.

It is an arithmetic number, because the mean of its divisors is an integer number (7301421568).

Almost surely, 2^100122120091 is an apocalyptic number.

100122120091 is a deficient number, since it is larger than the sum of its proper divisors (16700624997).

100122120091 is a wasteful number, since it uses less digits than its factorization.

100122120091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051762.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 100122120091 its reverse (190021221001), we get a palindrome (290143341092).

The spelling of 100122120091 in words is "one hundred billion, one hundred twenty-two million, one hundred twenty thousand, ninety-one".