221111010111201 has 32 divisors (see below), whose sum is σ = 341701742186496. Its totient is φ = 124560406152000.

The previous prime is 221111010111179. The next prime is 221111010111209. The reversal of 221111010111201 is 102111010111122.

It is not a de Polignac number, because 221111010111201 - 2⁹ = 221111010110689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221111010111209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14808471 + ... + 25719891.

It is an arithmetic number, because the mean of its divisors is an integer number (10678179443328).

Almost surely, 2^{221111010111201} is an apocalyptic number.

221111010111201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221111010111201 is a deficient number, since it is larger than the sum of its proper divisors (120590732075295).

221111010111201 is a wasteful number, since it uses less digits than its factorization.

221111010111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10925093.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 221111010111201 its reverse (102111010111122), we get a palindrome (323222020222323).

The spelling of 221111010111201 in words is "two hundred twenty-one trillion, one hundred eleven billion, ten million, one hundred eleven thousand, two hundred one".