210242513321 has 4 divisors (see below), whose sum is σ = 210382770000. Its totient is φ = 210102256644.

The previous prime is 210242513287. The next prime is 210242513333. The reversal of 210242513321 is 123315242012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210242513321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210242513821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70126091 + ... + 70129088.

It is an arithmetic number, because the mean of its divisors is an integer number (52595692500).

Almost surely, 2^210242513321 is an apocalyptic number.

It is an amenable number.

210242513321 is a deficient number, since it is larger than the sum of its proper divisors (140256679).

210242513321 is a wasteful number, since it uses less digits than its factorization.

210242513321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140256678.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 210242513321 its reverse (123315242012), we get a palindrome (333557755333).

The spelling of 210242513321 in words is "two hundred ten billion, two hundred forty-two million, five hundred thirteen thousand, three hundred twenty-one".