221002221222111 has 16 divisors (see below), whose sum is σ = 345867054063104. Its totient is φ = 122873821837344.

The previous prime is 221002221222031. The next prime is 221002221222137. The reversal of 221002221222111 is 111222122200122.

221002221222111 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 221002221222111 - 2⁷ = 221002221221983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002221222511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142215070795 + ... + 142215072348.

It is an arithmetic number, because the mean of its divisors is an integer number (21616690878944).

Almost surely, 2^{221002221222111} is an apocalyptic number.

221002221222111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221002221222111 is a deficient number, since it is larger than the sum of its proper divisors (124864832840993).

221002221222111 is a wasteful number, since it uses less digits than its factorization.

221002221222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284430143190.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221002221222111 its reverse (111222122200122), we get a palindrome (332224343422233).

The spelling of 221002221222111 in words is "two hundred twenty-one trillion, two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".