1212242320 has 40 divisors (see below), whose sum is σ = 2866245120. Its totient is φ = 476676480.

The previous prime is 1212242287. The next prime is 1212242399. The reversal of 1212242320 is 232422121.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123696 + ... + 133135.

It is an arithmetic number, because the mean of its divisors is an integer number (71656128).

Almost surely, 2^1212242320 is an apocalyptic number.

1212242320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212242320 is an abundant number, since it is smaller than the sum of its proper divisors (1654002800).

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

1212242320 is a wasteful number, since it uses less digits than its factorization.

1212242320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256903 (or 256897 counting only the distinct ones).

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

The square root of 1212242320 is about 34817.2704271889. The cubic root of 1212242320 is about 1066.2600733325.

Adding to 1212242320 its reverse (232422121), we get a palindrome (1444664441).

The spelling of 1212242320 in words is "one billion, two hundred twelve million, two hundred forty-two thousand, three hundred twenty".