221011121222110 has 96 divisors (see below), whose sum is σ = 429951985474752. Its totient is φ = 81639669027840.

The previous prime is 221011121222107. The next prime is 221011121222123. The reversal of 221011121222110 is 11222121110122.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 4390255540 + ... + 4390305880.

It is an arithmetic number, because the mean of its divisors is an integer number (4478666515362).

Almost surely, 2^{221011121222110} is an apocalyptic number.

221011121222110 is a deficient number, since it is larger than the sum of its proper divisors (208940864252642).

221011121222110 is a wasteful number, since it uses less digits than its factorization.

221011121222110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73126 (or 73097 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221011121222110 its reverse (11222121110122), we get a palindrome (232233242332232).

The spelling of 221011121222110 in words is "two hundred twenty-one trillion, eleven billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred ten".