213042123351 has 24 divisors (see below), whose sum is σ = 319266052560. Its totient is φ = 141965229312.

The previous prime is 213042123313. The next prime is 213042123367. The reversal of 213042123351 is 153321240312.

213042123351 is a `hidden beast` number, since 2 + 1 + 3 + 0 + 421 + 233 + 5 + 1 = 666.

213042123351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213042123351 - 2¹⁰ = 213042122327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213042123751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359485 + ... + 745193.

It is an arithmetic number, because the mean of its divisors is an integer number (13302752190).

Almost surely, 2^213042123351 is an apocalyptic number.

213042123351 is a deficient number, since it is larger than the sum of its proper divisors (106223929209).

213042123351 is an equidigital number, since it uses as much as digits as its factorization.

213042123351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387997 (or 387985 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 213042123351 its reverse (153321240312), we get a palindrome (366363363663).

The spelling of 213042123351 in words is "two hundred thirteen billion, forty-two million, one hundred twenty-three thousand, three hundred fifty-one".