221131002 has 32 divisors (see below), whose sum is σ = 473558400. Its totient is φ = 68592128.

The previous prime is 221130977. The next prime is 221131073. The reversal of 221131002 is 200131122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3102 + ... + 21257.

It is an arithmetic number, because the mean of its divisors is an integer number (14798700).

Almost surely, 2^221131002 is an apocalyptic number.

221131002 is an abundant number, since it is smaller than the sum of its proper divisors (252427398).

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

221131002 is a wasteful number, since it uses less digits than its factorization.

221131002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24470.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221131002 is about 14870.4741686336. The cubic root of 221131002 is about 604.7137976491.

Adding to 221131002 its reverse (200131122), we get a palindrome (421262124).

The spelling of 221131002 in words is "two hundred twenty-one million, one hundred thirty-one thousand, two".