211222222044 has 24 divisors (see below), whose sum is σ = 492941957760. Its totient is φ = 70394535024.

The previous prime is 211222222037. The next prime is 211222222051. The reversal of 211222222044 is 440222222112.

It is an interprime number because it is at equal distance from previous prime (211222222037) and next prime (211222222051).

It is a super-2 number, since 2×211222222044² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1540554 + ... + 1672049.

It is an arithmetic number, because the mean of its divisors is an integer number (20539248240).

Almost surely, 2^211222222044 is an apocalyptic number.

It is an amenable number.

211222222044 is an abundant number, since it is smaller than the sum of its proper divisors (281719735716).

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

211222222044 is a wasteful number, since it uses less digits than its factorization.

211222222044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218089 (or 3218087 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 211222222044 its reverse (440222222112), we get a palindrome (651444444156).

The spelling of 211222222044 in words is "two hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, forty-four".