12121101110105 has 8 divisors (see below), whose sum is σ = 15664192203912. Its totient is φ = 8950966973568.

The previous prime is 12121101110021. The next prime is 12121101110141. The reversal of 12121101110105 is 50101110112121.

It can be written as a sum of positive squares in 4 ways, for example, as 5327394121 + 12115773715984 = 72989^2 + 3480772^2 .

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 12121101110105 - 2²² = 12121096915801 is a prime.

It is a super-2 number, since 2×12121101110105² (a number of 27 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, 93239239244 + ... + 93239239373.

It is an arithmetic number, because the mean of its divisors is an integer number (1958024025489).

Almost surely, 2^{12121101110105} is an apocalyptic number.

It is an amenable number.

12121101110105 is a deficient number, since it is larger than the sum of its proper divisors (3543091093807).

12121101110105 is a wasteful number, since it uses less digits than its factorization.

12121101110105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186478478635.

The product of its (nonzero) digits is 20, while the sum is 17.

Adding to 12121101110105 its reverse (50101110112121), we get a palindrome (62222211222226).

The spelling of 12121101110105 in words is "twelve trillion, one hundred twenty-one billion, one hundred one million, one hundred ten thousand, one hundred five".