213321254361 has 4 divisors (see below), whose sum is σ = 284428339152. Its totient is φ = 142214169572.

The previous prime is 213321254357. The next prime is 213321254369. The reversal of 213321254361 is 163452123312.

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 not a de Polignac number, because 213321254361 - 2² = 213321254357 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213321254369) 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, 35553542391 + ... + 35553542396.

It is an arithmetic number, because the mean of its divisors is an integer number (71107084788).

Almost surely, 2^213321254361 is an apocalyptic number.

It is an amenable number.

213321254361 is a deficient number, since it is larger than the sum of its proper divisors (71107084791).

213321254361 is an equidigital number, since it uses as much as digits as its factorization.

213321254361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71107084790.

The product of its digits is 25920, while the sum is 33.

Adding to 213321254361 its reverse (163452123312), we get a palindrome (376773377673).

The spelling of 213321254361 in words is "two hundred thirteen billion, three hundred twenty-one million, two hundred fifty-four thousand, three hundred sixty-one".