1201213312 has 32 divisors (see below), whose sum is σ = 2577125880. Its totient is φ = 554405376.

The previous prime is 1201213309. The next prime is 1201213337. The reversal of 1201213312 is 2133121021.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359278 + ... + 362605.

Almost surely, 2^1201213312 is an apocalyptic number.

It is an amenable number.

1201213312 is an abundant number, since it is smaller than the sum of its proper divisors (1375912568).

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

1201213312 is an equidigital number, since it uses as much as digits as its factorization.

1201213312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721910 (or 721898 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1201213312 is about 34658.5243771283. The cubic root of 1201213312 is about 1063.0165975413.

Adding to 1201213312 its reverse (2133121021), we get a palindrome (3334334333).

The spelling of 1201213312 in words is "one billion, two hundred one million, two hundred thirteen thousand, three hundred twelve".