1222211652 has 12 divisors (see below), whose sum is σ = 2851827216. Its totient is φ = 407403880.

The previous prime is 1222211621. The next prime is 1222211663. The reversal of 1222211652 is 2561122221.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50925474 + ... + 50925497.

It is an arithmetic number, because the mean of its divisors is an integer number (237652268).

Almost surely, 2^1222211652 is an apocalyptic number.

1222211652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222211652 is an abundant number, since it is smaller than the sum of its proper divisors (1629615564).

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

1222211652 is a wasteful number, since it uses less digits than its factorization.

1222211652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101850978 (or 101850976 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 1222211652 is about 34960.1437640065. The cubic root of 1222211652 is about 1069.1750277760.

Adding to 1222211652 its reverse (2561122221), we get a palindrome (3783333873).

The spelling of 1222211652 in words is "one billion, two hundred twenty-two million, two hundred eleven thousand, six hundred fifty-two".