121000011201221 has 16 divisors (see below), whose sum is σ = 126387297803520. Its totient is φ = 115623314231040.

The previous prime is 121000011201217. The next prime is 121000011201263. The reversal of 121000011201221 is 122102110000121.

It is a cyclic number.

It is not a de Polignac number, because 121000011201221 - 2² = 121000011201217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121000011201196 and 121000011201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000011209221) 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, 96649376 + ... + 97893318.

It is an arithmetic number, because the mean of its divisors is an integer number (7899206112720).

Almost surely, 2^{121000011201221} is an apocalyptic number.

It is an amenable number.

121000011201221 is a deficient number, since it is larger than the sum of its proper divisors (5387286602299).

121000011201221 is a wasteful number, since it uses less digits than its factorization.

121000011201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248196.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121000011201221 its reverse (122102110000121), we get a palindrome (243102121201342).

The spelling of 121000011201221 in words is "one hundred twenty-one trillion, eleven million, two hundred one thousand, two hundred twenty-one".