221021001132210 has 48 divisors (see below), whose sum is σ = 575163597542040. Its totient is φ = 58886729061120.

The previous prime is 221021001132199. The next prime is 221021001132311. The reversal of 221021001132210 is 12231100120122.

221021001132210 is a `hidden beast` number, since 2 + 210 + 210 + 0 + 1 + 1 + 32 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 180493555474521 + 40527445657689 = 13434789^2 + 6366117^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1087493121 + ... + 1087696340.

Almost surely, 2^{221021001132210} is an apocalyptic number.

221021001132210 is an abundant number, since it is smaller than the sum of its proper divisors (354142596409830).

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

221021001132210 is a wasteful number, since it uses less digits than its factorization.

221021001132210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175190603 (or 2175190600 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221021001132210 its reverse (12231100120122), we get a palindrome (233252101252332).

The spelling of 221021001132210 in words is "two hundred twenty-one trillion, twenty-one billion, one million, one hundred thirty-two thousand, two hundred ten".