221021002110 has 64 divisors (see below), whose sum is σ = 533015562240. Its totient is φ = 58654104960.

The previous prime is 221021002093. The next prime is 221021002117. The reversal of 221021002110 is 11200120122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021002117) by changing a digit.

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, 34590796 + ... + 34597184.

It is an arithmetic number, because the mean of its divisors is an integer number (8328368160).

Almost surely, 2^221021002110 is an apocalyptic number.

221021002110 is an abundant number, since it is smaller than the sum of its proper divisors (311994560130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221021002110 is a wasteful number, since it uses less digits than its factorization.

221021002110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11793.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221021002110 its reverse (11200120122), we get a palindrome (232221122232).

The spelling of 221021002110 in words is "two hundred twenty-one billion, twenty-one million, two thousand, one hundred ten".