10111222220221 has 16 divisors (see below), whose sum is σ = 10139761510144. Its totient is φ = 10082738300544.

The previous prime is 10111222220179. The next prime is 10111222220233. The reversal of 10111222220221 is 12202222211101.

It is a cyclic number.

It is not a de Polignac number, because 10111222220221 - 2³⁵ = 10076862481853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111222220291) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1481928616 + ... + 1481935438.

It is an arithmetic number, because the mean of its divisors is an integer number (633735094384).

Almost surely, 2^{10111222220221} is an apocalyptic number.

It is an amenable number.

10111222220221 is a deficient number, since it is larger than the sum of its proper divisors (28539289923).

10111222220221 is a wasteful number, since it uses less digits than its factorization.

10111222220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10300.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 10111222220221 its reverse (12202222211101), we get a palindrome (22313444431322).

The spelling of 10111222220221 in words is "ten trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".