210221322140 has 24 divisors (see below), whose sum is σ = 441487883760. Its totient is φ = 84084127488.

The previous prime is 210221322131. The next prime is 210221322187. The reversal of 210221322140 is 41223122012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131204 + ... + 661556.

It is an arithmetic number, because the mean of its divisors is an integer number (18395328490).

Almost surely, 2^210221322140 is an apocalyptic number.

210221322140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221322140 is an abundant number, since it is smaller than the sum of its proper divisors (231266561620).

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

210221322140 is a wasteful number, since it uses less digits than its factorization.

210221322140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550181 (or 550179 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 210221322140 its reverse (41223122012), we get a palindrome (251444444152).

The spelling of 210221322140 in words is "two hundred ten billion, two hundred twenty-one million, three hundred twenty-two thousand, one hundred forty".