221221210122010 has 32 divisors (see below), whose sum is σ = 455136928202880. Its totient is φ = 75838389383232.

The previous prime is 221221210122007. The next prime is 221221210122067. The reversal of 221221210122010 is 10221012122122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184453389 + ... + 185648848.

It is an arithmetic number, because the mean of its divisors is an integer number (14223029006340).

Almost surely, 2^{221221210122010} is an apocalyptic number.

221221210122010 is an abundant number, since it is smaller than the sum of its proper divisors (233915718080870).

221221210122010 is a wasteful number, since it uses less digits than its factorization.

221221210122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370110790.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221221210122010 its reverse (10221012122122), we get a palindrome (231442222244132).

The spelling of 221221210122010 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred ten million, one hundred twenty-two thousand, ten".