121121020105 has 8 divisors (see below), whose sum is σ = 145477003392. Its totient is φ = 96808963248.

The previous prime is 121121020091. The next prime is 121121020169. The reversal of 121121020105 is 501020121121.

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 121121020105 - 2¹⁷ = 121120889033 is a prime.

It is a super-2 number, since 2×121121020105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10975539 + ... + 10986568.

It is an arithmetic number, because the mean of its divisors is an integer number (18184625424).

Almost surely, 2^121121020105 is an apocalyptic number.

It is an amenable number.

121121020105 is a deficient number, since it is larger than the sum of its proper divisors (24355983287).

121121020105 is a wasteful number, since it uses less digits than its factorization.

121121020105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21963215.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 121121020105 its reverse (501020121121), we get a palindrome (622141141226).

The spelling of 121121020105 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty thousand, one hundred five".