1303221120 has 64 divisors (see below), whose sum is σ = 4154023440. Its totient is φ = 347525120.

The previous prime is 1303221119. The next prime is 1303221133. The reversal of 1303221120 is 211223031.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1303221120² = 3396770575228108800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1303221120.

It is a congruent number.

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, 337461 + ... + 341300.

Almost surely, 2^1303221120 is an apocalyptic number.

1303221120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1303221120 is an abundant number, since it is smaller than the sum of its proper divisors (2850802320).

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

1303221120 is an equidigital number, since it uses as much as digits as its factorization.

1303221120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678783 (or 678771 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1303221120 is about 36100.1540162920. The cubic root of 1303221120 is about 1092.2935517475.

Adding to 1303221120 its reverse (211223031), we get a palindrome (1514444151).

The spelling of 1303221120 in words is "one billion, three hundred three million, two hundred twenty-one thousand, one hundred twenty".