1212226164 has 36 divisors (see below), whose sum is σ = 3077081280. Its totient is φ = 402381840.

The previous prime is 1212226159. The next prime is 1212226177. The reversal of 1212226164 is 4616222121.

1212226164 is a `hidden beast` number, since 1 + 21 + 2 + 22 + 616 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61842 + ... + 79049.

It is an arithmetic number, because the mean of its divisors is an integer number (85474480).

Almost surely, 2^1212226164 is an apocalyptic number.

It is an amenable number.

1212226164 is an abundant number, since it is smaller than the sum of its proper divisors (1864855116).

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

1212226164 is a wasteful number, since it uses less digits than its factorization.

1212226164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141140 (or 141135 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1212226164 is about 34817.0384151208. The cubic root of 1212226164 is about 1066.2553364979.

Adding to 1212226164 its reverse (4616222121), we get a palindrome (5828448285).

The spelling of 1212226164 in words is "one billion, two hundred twelve million, two hundred twenty-six thousand, one hundred sixty-four".