1301221312 has 28 divisors (see below), whose sum is σ = 2583282616. Its totient is φ = 650315520.

The previous prime is 1301221303. The next prime is 1301221333. The reversal of 1301221312 is 2131221031.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230362 + ... + 235942.

Almost surely, 2^1301221312 is an apocalyptic number.

It is an amenable number.

1301221312 is a deficient number, since it is larger than the sum of its proper divisors (1282061304).

1301221312 is an equidigital number, since it uses as much as digits as its factorization.

1301221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9236 (or 9226 counting only the distinct ones).

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

The square root of 1301221312 is about 36072.4453288102. The cubic root of 1301221312 is about 1091.7345533242.

Adding to 1301221312 its reverse (2131221031), we get a palindrome (3432442343).

The spelling of 1301221312 in words is "one billion, three hundred one million, two hundred twenty-one thousand, three hundred twelve".