221221120010 has 16 divisors (see below), whose sum is σ = 434397835872. Its totient is φ = 80444043600.

The previous prime is 221221119983. The next prime is 221221120069. The reversal of 221221120010 is 10021122122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1005550436 + ... + 1005550655.

It is an arithmetic number, because the mean of its divisors is an integer number (27149864742).

Almost surely, 2^221221120010 is an apocalyptic number.

221221120010 is a deficient number, since it is larger than the sum of its proper divisors (213176715862).

221221120010 is a wasteful number, since it uses less digits than its factorization.

221221120010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011101109.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221221120010 its reverse (10021122122), we get a palindrome (231242242132).

The spelling of 221221120010 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred twenty thousand, ten".