221121002112102 has 12 divisors (see below), whose sum is σ = 479095504576260. Its totient is φ = 73707000704028.

The previous prime is 221121002112091. The next prime is 221121002112193. The reversal of 221121002112102 is 201211200121122.

221121002112102 is a `hidden beast` number, since 22 + 11 + 210 + 0 + 211 + 210 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12284500117339 = 221121002112102 / (2 + 2 + 1 + 1 + 2 + 1 + 0 + 0 + 2 + 1 + 1 + 2 + 1 + 0 + 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6142250058652 + ... + 6142250058687.

It is an arithmetic number, because the mean of its divisors is an integer number (39924625381355).

Almost surely, 2^{221121002112102} is an apocalyptic number.

221121002112102 is an abundant number, since it is smaller than the sum of its proper divisors (257974502464158).

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

221121002112102 is a wasteful number, since it uses less digits than its factorization.

221121002112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12284500117347 (or 12284500117344 counting only the distinct ones).

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

Adding to 221121002112102 its reverse (201211200121122), we get a palindrome (422332202233224).

The spelling of 221121002112102 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two million, one hundred twelve thousand, one hundred two".