221210211000 has 128 divisors (see below), whose sum is σ = 707009808960. Its totient is φ = 57550592000.

The previous prime is 221210210989. The next prime is 221210211007. The reversal of 221210211000 is 112012122.

221210211000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210211007) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 776229 + ... + 1022228.

Almost surely, 2^221210211000 is an apocalyptic number.

221210211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210211000 is an abundant number, since it is smaller than the sum of its proper divisors (485799597960).

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

221210211000 is a wasteful number, since it uses less digits than its factorization.

221210211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798522 (or 1798508 counting only the distinct ones).

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

Adding to 221210211000 its reverse (112012122), we get a palindrome (221322223122).

The spelling of 221210211000 in words is "two hundred twenty-one billion, two hundred ten million, two hundred eleven thousand".