221421323242130 has 32 divisors (see below), whose sum is σ = 439095823034688. Its totient is φ = 79719648328000.

The previous prime is 221421323242111. The next prime is 221421323242151. The reversal of 221421323242130 is 31242323124122.

It is a happy number.

It is a Curzon number.

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, 9964944932 + ... + 9964967151.

It is an arithmetic number, because the mean of its divisors is an integer number (13721744469834).

Almost surely, 2^{221421323242130} is an apocalyptic number.

221421323242130 is a deficient number, since it is larger than the sum of its proper divisors (217674499792558).

221421323242130 is a wasteful number, since it uses less digits than its factorization.

221421323242130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19929912202.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 221421323242130 its reverse (31242323124122), we get a palindrome (252663646366252).

The spelling of 221421323242130 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, three hundred twenty-three million, two hundred forty-two thousand, one hundred thirty".