121121605122 has 16 divisors (see below), whose sum is σ = 276849383232. Its totient is φ = 34606172880.

The previous prime is 121121605103. The next prime is 121121605141. The reversal of 121121605122 is 221506121121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121121605103) and next prime (121121605141).

It is a junction number, because it is equal to n+sod(n) for n = 121121605092 and 121121605101.

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, 1441923829 + ... + 1441923912.

It is an arithmetic number, because the mean of its divisors is an integer number (17303086452).

Almost surely, 2^121121605122 is an apocalyptic number.

121121605122 is an abundant number, since it is smaller than the sum of its proper divisors (155727778110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121121605122 is a wasteful number, since it uses less digits than its factorization.

121121605122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883847753.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 121121605122 its reverse (221506121121), we get a palindrome (342627726243).

The spelling of 121121605122 in words is "one hundred twenty-one billion, one hundred twenty-one million, six hundred five thousand, one hundred twenty-two".