221121102 has 32 divisors (see below), whose sum is σ = 455445504. Its totient is φ = 71517600.

The previous prime is 221121071. The next prime is 221121113. The reversal of 221121102 is 201121122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94527 + ... + 96837.

It is an arithmetic number, because the mean of its divisors is an integer number (14232672).

Almost surely, 2^221121102 is an apocalyptic number.

221121102 is an abundant number, since it is smaller than the sum of its proper divisors (234324402).

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

221121102 is a wasteful number, since it uses less digits than its factorization.

221121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 221121102 is about 14870.1412905191. The cubic root of 221121102 is about 604.7047732007.

Adding to 221121102 its reverse (201121122), we get a palindrome (422242224).

The spelling of 221121102 in words is "two hundred twenty-one million, one hundred twenty-one thousand, one hundred two".