121000221101121 has 16 divisors (see below), whose sum is σ = 161500473114624. Its totient is φ = 80583408515664.

The previous prime is 121000221101113. The next prime is 121000221101129. The reversal of 121000221101121 is 121101122000121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121000221101113) and next prime (121000221101129).

It is not a de Polignac number, because 121000221101121 - 2³ = 121000221101113 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121000221101121.

It is not an unprimeable number, because it can be changed into a prime (121000221101129) 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, 26529030 + ... + 30753696.

It is an arithmetic number, because the mean of its divisors is an integer number (10093779569664).

Almost surely, 2^{121000221101121} is an apocalyptic number.

It is an amenable number.

121000221101121 is a deficient number, since it is larger than the sum of its proper divisors (40500252013503).

121000221101121 is a wasteful number, since it uses less digits than its factorization.

121000221101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234540.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121000221101121 its reverse (121101122000121), we get a palindrome (242101343101242).

The spelling of 121000221101121 in words is "one hundred twenty-one trillion, two hundred twenty-one million, one hundred one thousand, one hundred twenty-one".