1212120544 has 24 divisors (see below), whose sum is σ = 2426812920. Its totient is φ = 595787136.

The previous prime is 1212120529. The next prime is 1212120577. The reversal of 1212120544 is 4450212121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319119 + ... + 322894.

It is an arithmetic number, because the mean of its divisors is an integer number (101117205).

Almost surely, 2^1212120544 is an apocalyptic number.

It is an amenable number.

1212120544 is an abundant number, since it is smaller than the sum of its proper divisors (1214692376).

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

1212120544 is an equidigital number, since it uses as much as digits as its factorization.

1212120544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642082 (or 642074 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1212120544 is about 34815.5215959778. The cubic root of 1212120544 is about 1066.2243683604.

Adding to 1212120544 its reverse (4450212121), we get a palindrome (5662332665).

The spelling of 1212120544 in words is "one billion, two hundred twelve million, one hundred twenty thousand, five hundred forty-four".