1212023444 has 12 divisors (see below), whose sum is σ = 2121336000. Its totient is φ = 605927448.

The previous prime is 1212023431. The next prime is 1212023459. The reversal of 1212023444 is 4443202121.

It is a super-2 number, since 2×1212023444² = 2938001657611242272, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 20327 + ... + 53265.

It is an arithmetic number, because the mean of its divisors is an integer number (176778000).

Almost surely, 2^1212023444 is an apocalyptic number.

It is an amenable number.

1212023444 is a deficient number, since it is larger than the sum of its proper divisors (909312556).

1212023444 is a wasteful number, since it uses less digits than its factorization.

1212023444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42142 (or 42140 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1212023444 is about 34814.1270750826. The cubic root of 1212023444 is about 1066.1958967282.

Adding to 1212023444 its reverse (4443202121), we get a palindrome (5655225565).

The spelling of 1212023444 in words is "one billion, two hundred twelve million, twenty-three thousand, four hundred forty-four".