121102220011221 has 80 divisors (see below), whose sum is σ = 185394179621376. Its totient is φ = 78755782732704.

The previous prime is 121102220011189. The next prime is 121102220011231. The reversal of 121102220011221 is 122110022201121.

121102220011221 is a `hidden beast` number, since 1 + 211 + 0 + 2 + 220 + 0 + 11 + 221 = 666.

It is not a de Polignac number, because 121102220011221 - 2⁵ = 121102220011189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121102220011194 and 121102220011203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102220011231) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1537044390 + ... + 1537123176.

Almost surely, 2^{121102220011221} is an apocalyptic number.

It is an amenable number.

121102220011221 is a deficient number, since it is larger than the sum of its proper divisors (64291959610155).

121102220011221 is a wasteful number, since it uses less digits than its factorization.

121102220011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81620 (or 81611 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121102220011221 its reverse (122110022201121), we get a palindrome (243212242212342).

The spelling of 121102220011221 in words is "one hundred twenty-one trillion, one hundred two billion, two hundred twenty million, eleven thousand, two hundred twenty-one".