213204121124 has 6 divisors (see below), whose sum is σ = 373107211974. Its totient is φ = 106602060560.

The previous prime is 213204121121. The next prime is 213204121129. The reversal of 213204121124 is 421121402312.

213204121124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 207125112100 + 6079009024 = 455110^2 + 77968^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213204121124.

It is not an unprimeable number, because it can be changed into a prime (213204121121) 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 as a sum of consecutive naturals, namely, 26650515137 + ... + 26650515144.

It is an arithmetic number, because the mean of its divisors is an integer number (62184535329).

Almost surely, 2^213204121124 is an apocalyptic number.

It is an amenable number.

213204121124 is a deficient number, since it is larger than the sum of its proper divisors (159903090850).

213204121124 is a wasteful number, since it uses less digits than its factorization.

213204121124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53301030285 (or 53301030283 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 213204121124 its reverse (421121402312), we get a palindrome (634325523436).

The spelling of 213204121124 in words is "two hundred thirteen billion, two hundred four million, one hundred twenty-one thousand, one hundred twenty-four".