221010120022111 has 4 divisors (see below), whose sum is σ = 252582994310992. Its totient is φ = 189437245733232.

The previous prime is 221010120022073. The next prime is 221010120022141. The reversal of 221010120022111 is 111220021010122.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 221010120022111 - 2⁷ = 221010120021983 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 (221010120022141) 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 3 ways as a sum of consecutive naturals, for example, 15786437144430 + ... + 15786437144443.

It is an arithmetic number, because the mean of its divisors is an integer number (63145748577748).

Almost surely, 2^{221010120022111} is an apocalyptic number.

221010120022111 is a deficient number, since it is larger than the sum of its proper divisors (31572874288881).

221010120022111 is an equidigital number, since it uses as much as digits as its factorization.

221010120022111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31572874288880.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221010120022111 its reverse (111220021010122), we get a palindrome (332230141032233).

The spelling of 221010120022111 in words is "two hundred twenty-one trillion, ten billion, one hundred twenty million, twenty-two thousand, one hundred eleven".