211220222224 has 20 divisors (see below), whose sum is σ = 446442742800. Its totient is φ = 96009191840.

The previous prime is 211220222189. The next prime is 211220222261. The reversal of 211220222224 is 422222022112.

It is a super-2 number, since 2×211220222224² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 211220222195 and 211220222204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600057274 + ... + 600057625.

It is an arithmetic number, because the mean of its divisors is an integer number (22322137140).

Almost surely, 2^211220222224 is an apocalyptic number.

It is an amenable number.

211220222224 is an abundant number, since it is smaller than the sum of its proper divisors (235222520576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211220222224 is a wasteful number, since it uses less digits than its factorization.

211220222224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200114918 (or 1200114912 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 211220222224 its reverse (422222022112), we get a palindrome (633442244336).

The spelling of 211220222224 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty-four".