121221321123222 has 48 divisors (see below), whose sum is σ = 268554104477568. Its totient is φ = 39503624334720.

The previous prime is 121221321123179. The next prime is 121221321123223. The reversal of 121221321123222 is 222321123122121.

121221321123222 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 2 + 1 + 321 + 12 + 322 + 2 = 666.

It is a super-2 number, since 2×121221321123222² (a number of 29 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221321123223) 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, 225828678 + ... + 226364825.

It is an arithmetic number, because the mean of its divisors is an integer number (5594877176616).

Almost surely, 2^{121221321123222} is an apocalyptic number.

121221321123222 is an abundant number, since it is smaller than the sum of its proper divisors (147332783354346).

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

121221321123222 is a wasteful number, since it uses less digits than its factorization.

121221321123222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452193845 (or 452193842 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 121221321123222 its reverse (222321123122121), we get a palindrome (343542444245343).

The spelling of 121221321123222 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, three hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-two".