121890110117 has 8 divisors (see below), whose sum is σ = 122485276032. Its totient is φ = 121295109600.

The previous prime is 121890110093. The next prime is 121890110123. The reversal of 121890110117 is 711011098121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121890110117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121890112117) 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, 1593017 + ... + 1667777.

It is an arithmetic number, because the mean of its divisors is an integer number (15310659504).

Almost surely, 2^121890110117 is an apocalyptic number.

It is an amenable number.

121890110117 is a deficient number, since it is larger than the sum of its proper divisors (595165915).

121890110117 is an equidigital number, since it uses as much as digits as its factorization.

121890110117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82699.

The product of its (nonzero) digits is 1008, while the sum is 32.

The spelling of 121890110117 in words is "one hundred twenty-one billion, eight hundred ninety million, one hundred ten thousand, one hundred seventeen".