121868868121 has 16 divisors (see below), whose sum is σ = 163628131968. Its totient is φ = 87657926400.

The previous prime is 121868868119. The next prime is 121868868131.

121868868121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 121868868121 - 2¹ = 121868868119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121868868131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60872560 + ... + 60874561.

It is an arithmetic number, because the mean of its divisors is an integer number (10226758248).

Almost surely, 2^121868868121 is an apocalyptic number.

121868868121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121868868121 is a deficient number, since it is larger than the sum of its proper divisors (41759263847).

121868868121 is a wasteful number, since it uses less digits than its factorization.

121868868121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121747152.

The product of its digits is 589824, while the sum is 52.

It can be divided in two parts, 121868 and 868121, that added together give a palindrome (989989).

The spelling of 121868868121 in words is "one hundred twenty-one billion, eight hundred sixty-eight million, eight hundred sixty-eight thousand, one hundred twenty-one".