221111213121002 has 16 divisors (see below), whose sum is σ = 332222452357824. Its totient is φ = 110370468552000.

The previous prime is 221111213120999. The next prime is 221111213121017. The reversal of 221111213121002 is 200121312111122.

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, 12149999 + ... + 24286722.

It is an arithmetic number, because the mean of its divisors is an integer number (20763903272364).

Almost surely, 2^{221111213121002} is an apocalyptic number.

221111213121002 is a deficient number, since it is larger than the sum of its proper divisors (111111239236822).

221111213121002 is a wasteful number, since it uses less digits than its factorization.

221111213121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36441805.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 221111213121002 its reverse (200121312111122), we get a palindrome (421232525232124).

The spelling of 221111213121002 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred thirteen million, one hundred twenty-one thousand, two".