213421123351 has 2 divisors, whose sum is σ = 213421123352. Its totient is φ = 213421123350.

The previous prime is 213421123301. The next prime is 213421123361. The reversal of 213421123351 is 153321124312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213421123351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213421123301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106710561675 + 106710561676.

It is an arithmetic number, because the mean of its divisors is an integer number (106710561676).

Almost surely, 2^213421123351 is an apocalyptic number.

213421123351 is a deficient number, since it is larger than the sum of its proper divisors (1).

213421123351 is an equidigital number, since it uses as much as digits as its factorization.

213421123351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 28.

Adding to 213421123351 its reverse (153321124312), we get a palindrome (366742247663).

The spelling of 213421123351 in words is "two hundred thirteen billion, four hundred twenty-one million, one hundred twenty-three thousand, three hundred fifty-one".