1321220130 has 64 divisors (see below), whose sum is σ = 3216931200. Its totient is φ = 347240960.

The previous prime is 1321220123. The next prime is 1321220143. The reversal of 1321220130 is 310221231.

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

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1118140 + ... + 1119320.

It is an arithmetic number, because the mean of its divisors is an integer number (50264550).

Almost surely, 2^1321220130 is an apocalyptic number.

1321220130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321220130 is an abundant number, since it is smaller than the sum of its proper divisors (1895711070).

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

1321220130 is a wasteful number, since it uses less digits than its factorization.

1321220130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1699.

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

The square root of 1321220130 is about 36348.5918571820. The cubic root of 1321220130 is about 1097.2991951394.

Adding to 1321220130 its reverse (310221231), we get a palindrome (1631441361).

The spelling of 1321220130 in words is "one billion, three hundred twenty-one million, two hundred twenty thousand, one hundred thirty".