1221130402 has 8 divisors (see below), whose sum is σ = 1832875200. Its totient is φ = 610172004.

The previous prime is 1221130373. The next prime is 1221130403. The reversal of 1221130402 is 2040311221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1221130403) by changing a digit.

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, 192702 + ... + 198937.

It is an arithmetic number, because the mean of its divisors is an integer number (229109400).

Almost surely, 2^1221130402 is an apocalyptic number.

1221130402 is a deficient number, since it is larger than the sum of its proper divisors (611744798).

1221130402 is a wasteful number, since it uses less digits than its factorization.

1221130402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393200.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221130402 is about 34944.6763041239. The cubic root of 1221130402 is about 1068.8596468927.

Adding to 1221130402 its reverse (2040311221), we get a palindrome (3261441623).

The spelling of 1221130402 in words is "one billion, two hundred twenty-one million, one hundred thirty thousand, four hundred two".