221012221221010 has 16 divisors (see below), whose sum is σ = 399821103720000. Its totient is φ = 87960642816816.

The previous prime is 221012221220993. The next prime is 221012221221061. The reversal of 221012221221010 is 10122122210122.

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 7 ways as a sum of consecutive naturals, for example, 55530706860 + ... + 55530710839.

It is an arithmetic number, because the mean of its divisors is an integer number (24988818982500).

Almost surely, 2^{221012221221010} is an apocalyptic number.

221012221221010 is a deficient number, since it is larger than the sum of its proper divisors (178808882498990).

221012221221010 is a wasteful number, since it uses less digits than its factorization.

221012221221010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111061417905.

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

Adding to 221012221221010 its reverse (10122122210122), we get a palindrome (231134343431132).

The spelling of 221012221221010 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, ten".