213251023424321 has 16 divisors (see below), whose sum is σ = 218277265331136. Its totient is φ = 208227830098176.

The previous prime is 213251023424317. The next prime is 213251023424389. The reversal of 213251023424321 is 123424320152312.

It is a cyclic number.

It is not a de Polignac number, because 213251023424321 - 2² = 213251023424317 is a prime.

It is a super-2 number, since 2×213251023424321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213251023424311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3672090941 + ... + 3672149013.

It is an arithmetic number, because the mean of its divisors is an integer number (13642329083196).

Almost surely, 2^{213251023424321} is an apocalyptic number.

It is an amenable number.

213251023424321 is a deficient number, since it is larger than the sum of its proper divisors (5026241906815).

213251023424321 is a wasteful number, since it uses less digits than its factorization.

213251023424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82832.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 213251023424321 its reverse (123424320152312), we get a palindrome (336675343576633).

The spelling of 213251023424321 in words is "two hundred thirteen trillion, two hundred fifty-one billion, twenty-three million, four hundred twenty-four thousand, three hundred twenty-one".