221210210001111 has 64 divisors (see below), whose sum is σ = 313999874213760. Its totient is φ = 138523048673280.

The previous prime is 221210210001089. The next prime is 221210210001113. The reversal of 221210210001111 is 111100012012122.

It is a happy number.

221210210001111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221210210001111 - 2⁹ = 221210210000599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210210001113) 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, 35835119221 + ... + 35835125393.

It is an arithmetic number, because the mean of its divisors is an integer number (4906248034590).

Almost surely, 2^{221210210001111} is an apocalyptic number.

221210210001111 is a deficient number, since it is larger than the sum of its proper divisors (92789664212649).

221210210001111 is an equidigital number, since it uses as much as digits as its factorization.

221210210001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10661 (or 10627 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221210210001111 its reverse (111100012012122), we get a palindrome (332310222013233).

The spelling of 221210210001111 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred ten million, one thousand, one hundred eleven".