1212322240 has 56 divisors (see below), whose sum is σ = 2901647232. Its totient is φ = 482442240.

The previous prime is 1212322213. The next prime is 1212322247. The reversal of 1212322240 is 422232121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212322247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53425 + ... + 72655.

Almost surely, 2^1212322240 is an apocalyptic number.

1212322240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1450823616).

1212322240 is an abundant number, since it is smaller than the sum of its proper divisors (1689324992).

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

1212322240 is a wasteful number, since it uses less digits than its factorization.

1212322240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19445 (or 19435 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1212322240 is about 34818.4181145554. The cubic root of 1212322240 is about 1066.2835047403.

Adding to 1212322240 its reverse (422232121), we get a palindrome (1634554361).

The spelling of 1212322240 in words is "one billion, two hundred twelve million, three hundred twenty-two thousand, two hundred forty".