221001211111010 has 32 divisors (see below), whose sum is σ = 437947354152000. Its totient is φ = 79626791655360.

The previous prime is 221001211111003. The next prime is 221001211111013. The reversal of 221001211111010 is 10111112100122.

It is not an unprimeable number, because it can be changed into a prime (221001211111013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9216051860 + ... + 9216075839.

It is an arithmetic number, because the mean of its divisors is an integer number (13685854817250).

Almost surely, 2^{221001211111010} is an apocalyptic number.

221001211111010 is a deficient number, since it is larger than the sum of its proper divisors (216946143040990).

221001211111010 is a wasteful number, since it uses less digits than its factorization.

221001211111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18432127826.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221001211111010 its reverse (10111112100122), we get a palindrome (231112323211132).

The spelling of 221001211111010 in words is "two hundred twenty-one trillion, one billion, two hundred eleven million, one hundred eleven thousand, ten".