221121002112111 has 8 divisors (see below), whose sum is σ = 327586669795760. Its totient is φ = 147414001408056.

The previous prime is 221121002112091. The next prime is 221121002112193. The reversal of 221121002112111 is 111211200121122.

It is a happy number.

221121002112111 is a `hidden beast` number, since 2 + 211 + 210 + 0 + 211 + 21 + 11 = 666.

It is not a de Polignac number, because 221121002112111 - 2⁶ = 221121002112047 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 (221121002112011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4094833372420 + ... + 4094833372473.

It is an arithmetic number, because the mean of its divisors is an integer number (40948333724470).

Almost surely, 2^{221121002112111} is an apocalyptic number.

221121002112111 is a deficient number, since it is larger than the sum of its proper divisors (106465667683649).

221121002112111 is an equidigital number, since it uses as much as digits as its factorization.

221121002112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189666744902 (or 8189666744896 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221121002112111 its reverse (111211200121122), we get a palindrome (332332202233233).

The spelling of 221121002112111 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two million, one hundred twelve thousand, one hundred eleven".