121220021110221 has 24 divisors (see below), whose sum is σ = 191063594213856. Its totient is φ = 73447361147040.

The previous prime is 121220021110193. The next prime is 121220021110247. The reversal of 121220021110221 is 122011120022121.

121220021110221 is a `hidden beast` number, since 1 + 2 + 1 + 220 + 0 + 211 + 10 + 221 = 666.

It is not a de Polignac number, because 121220021110221 - 2¹⁴ = 121220021093837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121220021110194 and 121220021110203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220021110261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160607550 + ... + 161360543.

It is an arithmetic number, because the mean of its divisors is an integer number (7960983092244).

Almost surely, 2^{121220021110221} is an apocalyptic number.

121220021110221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121220021110221 is a deficient number, since it is larger than the sum of its proper divisors (69843573103635).

121220021110221 is a wasteful number, since it uses less digits than its factorization.

121220021110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321971913 (or 321971910 counting only the distinct ones).

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

Adding to 121220021110221 its reverse (122011120022121), we get a palindrome (243231141132342).

The spelling of 121220021110221 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty-one million, one hundred ten thousand, two hundred twenty-one".