111222211122201 has 64 divisors (see below), whose sum is σ = 158066625945600. Its totient is φ = 69367853108736.

The previous prime is 111222211122161. The next prime is 111222211122233. The reversal of 111222211122201 is 102221112222111.

It is not a de Polignac number, because 111222211122201 - 2¹⁵ = 111222211089433 is a prime.

It is a super-2 number, since 2×111222211122201² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111222211122301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1155831576 + ... + 1155927798.

It is an arithmetic number, because the mean of its divisors is an integer number (2469791030400).

Almost surely, 2^{111222211122201} is an apocalyptic number.

It is an amenable number.

111222211122201 is a deficient number, since it is larger than the sum of its proper divisors (46844414823399).

111222211122201 is a wasteful number, since it uses less digits than its factorization.

111222211122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97198.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 111222211122201 its reverse (102221112222111), we get a palindrome (213443323344312).

The spelling of 111222211122201 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred eleven million, one hundred twenty-two thousand, two hundred one".