210540233003221 has 32 divisors (see below), whose sum is σ = 238880070696960. Its totient is φ = 183879993931200.

The previous prime is 210540233003209. The next prime is 210540233003267. The reversal of 210540233003221 is 122300332045012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 210540233003221 - 2²¹ = 210540230906069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210540233003221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210540233009221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2333095020 + ... + 2333185258.

It is an arithmetic number, because the mean of its divisors is an integer number (7465002209280).

Almost surely, 2^{210540233003221} is an apocalyptic number.

It is an amenable number.

210540233003221 is a deficient number, since it is larger than the sum of its proper divisors (28339837693739).

210540233003221 is a wasteful number, since it uses less digits than its factorization.

210540233003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171217.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 210540233003221 its reverse (122300332045012), we get a palindrome (332840565048233).

The spelling of 210540233003221 in words is "two hundred ten trillion, five hundred forty billion, two hundred thirty-three million, three thousand, two hundred twenty-one".