1212330320 has 20 divisors (see below), whose sum is σ = 2818668180. Its totient is φ = 484932096.

The previous prime is 1212330307. The next prime is 1212330337. The reversal of 1212330320 is 230332121.

It can be written as a sum of positive squares in 2 ways, for example, as 238640704 + 973689616 = 15448^2 + 31204^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7576985 + ... + 7577144.

It is an arithmetic number, because the mean of its divisors is an integer number (140933409).

Almost surely, 2^1212330320 is an apocalyptic number.

1212330320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212330320 is an abundant number, since it is smaller than the sum of its proper divisors (1606337860).

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

1212330320 is a wasteful number, since it uses less digits than its factorization.

1212330320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15154142 (or 15154136 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1212330320 is about 34818.5341449062. The cubic root of 1212330320 is about 1066.2858736242.

Adding to 1212330320 its reverse (230332121), we get a palindrome (1442662441).

The spelling of 1212330320 in words is "one billion, two hundred twelve million, three hundred thirty thousand, three hundred twenty".