1221003130 has 32 divisors (see below), whose sum is σ = 2259000576. Its totient is φ = 474936384.

The previous prime is 1221003101. The next prime is 1221003131. The reversal of 1221003130 is 313001221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221003130.

It is not an unprimeable number, because it can be changed into a prime (1221003131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65517 + ... + 82063.

It is an arithmetic number, because the mean of its divisors is an integer number (70593768).

Almost surely, 2^1221003130 is an apocalyptic number.

1221003130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221003130 is a deficient number, since it is larger than the sum of its proper divisors (1037997446).

1221003130 is a wasteful number, since it uses less digits than its factorization.

1221003130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1221003130 is about 34942.8552067515. The cubic root of 1221003130 is about 1068.8225117292.

Adding to 1221003130 its reverse (313001221), we get a palindrome (1534004351).

The spelling of 1221003130 in words is "one billion, two hundred twenty-one million, three thousand, one hundred thirty".