1212320361 has 8 divisors (see below), whose sum is σ = 1847345344. Its totient is φ = 692754480.

The previous prime is 1212320341. The next prime is 1212320381. The reversal of 1212320361 is 1630232121.

It is an interprime number because it is at equal distance from previous prime (1212320341) and next prime (1212320381).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1212320361 - 2⁶ = 1212320297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 57729541 = 1212320361 / (1 + 2 + 1 + 2 + 3 + 2 + 0 + 3 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212320341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28864750 + ... + 28864791.

It is an arithmetic number, because the mean of its divisors is an integer number (230918168).

Almost surely, 2^1212320361 is an apocalyptic number.

It is an amenable number.

1212320361 is a deficient number, since it is larger than the sum of its proper divisors (635024983).

1212320361 is an equidigital number, since it uses as much as digits as its factorization.

1212320361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57729551.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1212320361 is about 34818.3911316994. The cubic root of 1212320361 is about 1066.2829538561.

Adding to 1212320361 its reverse (1630232121), we get a palindrome (2842552482).

The spelling of 1212320361 in words is "one billion, two hundred twelve million, three hundred twenty thousand, three hundred sixty-one".