221121111112102 has 16 divisors (see below), whose sum is σ = 337742015965200. Its totient is φ = 108545312747520.

The previous prime is 221121111112001. The next prime is 221121111112127. The reversal of 221121111112102 is 201211111121122.

It is a self number, because there is not a number n which added to its sum of digits gives 221121111112102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218314799 + ... + 1218496282.

It is an arithmetic number, because the mean of its divisors is an integer number (21108875997825).

Almost surely, 2^{221121111112102} is an apocalyptic number.

221121111112102 is a deficient number, since it is larger than the sum of its proper divisors (116620904853098).

221121111112102 is a wasteful number, since it uses less digits than its factorization.

221121111112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436811911.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 221121111112102 its reverse (201211111121122), we get a palindrome (422332222233224).

The spelling of 221121111112102 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred eleven million, one hundred twelve thousand, one hundred two".