211222004 has 12 divisors (see below), whose sum is σ = 422444064. Its totient is φ = 90523704.

The previous prime is 211221979. The next prime is 211222019. The reversal of 211222004 is 400222112.

211222004 is an admirable number.

It is a super-2 number, since 2×211222004² = 89229469947552032, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a self number, because there is not a number n which added to its sum of digits gives 211222004.

It is a congruent number.

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, 3771794 + ... + 3771849.

It is an arithmetic number, because the mean of its divisors is an integer number (35203672).

Almost surely, 2^211222004 is an apocalyptic number.

It is an amenable number.

211222004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

211222004 is a wasteful number, since it uses less digits than its factorization.

211222004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7543654 (or 7543652 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 211222004 is about 14533.4787301595. The cubic root of 211222004 is about 595.5429020778.

Adding to 211222004 its reverse (400222112), we get a palindrome (611444116).

The spelling of 211222004 in words is "two hundred eleven million, two hundred twenty-two thousand, four".