221111002221 has 16 divisors (see below), whose sum is σ = 302915028864. Its totient is φ = 143360639424.

The previous prime is 221111002219. The next prime is 221111002237. The reversal of 221111002221 is 122200111122.

It is not a de Polignac number, because 221111002221 - 2¹ = 221111002219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221111002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111002261) 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, 179841 + ... + 688886.

It is an arithmetic number, because the mean of its divisors is an integer number (18932189304).

Almost surely, 2^221111002221 is an apocalyptic number.

It is an amenable number.

221111002221 is a deficient number, since it is larger than the sum of its proper divisors (81804026643).

221111002221 is a wasteful number, since it uses less digits than its factorization.

221111002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871060.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221111002221 its reverse (122200111122), we get a palindrome (343311113343).

The spelling of 221111002221 in words is "two hundred twenty-one billion, one hundred eleven million, two thousand, two hundred twenty-one".