221011211223 has 48 divisors (see below), whose sum is σ = 358504952832. Its totient is φ = 130022712000.

The previous prime is 221011211207. The next prime is 221011211263. The reversal of 221011211223 is 322112110122.

221011211223 is a `hidden beast` number, since 221 + 0 + 11 + 211 + 223 = 666.

It is not a de Polignac number, because 221011211223 - 2⁴ = 221011211207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221011211196 and 221011211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221011211263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1508758 + ... + 1648748.

It is an arithmetic number, because the mean of its divisors is an integer number (7468853184).

Almost surely, 2^221011211223 is an apocalyptic number.

221011211223 is a deficient number, since it is larger than the sum of its proper divisors (137493741609).

221011211223 is a wasteful number, since it uses less digits than its factorization.

221011211223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140476 (or 140473 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221011211223 its reverse (322112110122), we get a palindrome (543123321345).

It can be divided in two parts, 221011 and 211223, that added together give a palindrome (432234).

The spelling of 221011211223 in words is "two hundred twenty-one billion, eleven million, two hundred eleven thousand, two hundred twenty-three".