221221221102010 has 64 divisors (see below), whose sum is σ = 399805419744000. Its totient is φ = 88131914956800.

The previous prime is 221221221101843. The next prime is 221221221102023. The reversal of 221221221102010 is 10201122122122.

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 31 ways as a sum of consecutive naturals, for example, 18001557946 + ... + 18001570234.

It is an arithmetic number, because the mean of its divisors is an integer number (6246959683500).

Almost surely, 2^{221221221102010} is an apocalyptic number.

221221221102010 is a deficient number, since it is larger than the sum of its proper divisors (178584198641990).

221221221102010 is a wasteful number, since it uses less digits than its factorization.

221221221102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17687.

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

Adding to 221221221102010 its reverse (10201122122122), we get a palindrome (231422343224132).

The spelling of 221221221102010 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, ten".