120091001921 has 8 divisors (see below), whose sum is σ = 132305479488. Its totient is φ = 108092710000.

The previous prime is 120091001917. The next prime is 120091001929. The reversal of 120091001921 is 129100190021.

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

It is not a de Polignac number, because 120091001921 - 2² = 120091001917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120091001929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54045245 + ... + 54047466.

It is an arithmetic number, because the mean of its divisors is an integer number (16538184936).

Almost surely, 2^120091001921 is an apocalyptic number.

120091001921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120091001921 is a deficient number, since it is larger than the sum of its proper divisors (12214477567).

120091001921 is a wasteful number, since it uses less digits than its factorization.

120091001921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108092823.

The product of its (nonzero) digits is 324, while the sum is 26.

Adding to 120091001921 its reverse (129100190021), we get a palindrome (249191191942).

It can be divided in two parts, 12009100 and 1921, that added together give a palindrome (12011021).

The spelling of 120091001921 in words is "one hundred twenty billion, ninety-one million, one thousand, nine hundred twenty-one".