121121010091 has 8 divisors (see below), whose sum is σ = 122042975040. Its totient is φ = 120202505472.

The previous prime is 121121010077. The next prime is 121121010103. The reversal of 121121010091 is 190010121121.

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 121121010091 - 2⁷ = 121121009963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121010691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794790 + ... + 934843.

It is an arithmetic number, because the mean of its divisors is an integer number (15255371880).

Almost surely, 2^121121010091 is an apocalyptic number.

121121010091 is a deficient number, since it is larger than the sum of its proper divisors (921964949).

121121010091 is a wasteful number, since it uses less digits than its factorization.

121121010091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730165.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 121121010091 in words is "one hundred twenty-one billion, one hundred twenty-one million, ten thousand, ninety-one".