213111123303 has 32 divisors (see below), whose sum is σ = 306688757760. Its totient is φ = 130852915200.

The previous prime is 213111123263. The next prime is 213111123317. The reversal of 213111123303 is 303321111312.

It is a happy number.

It is not a de Polignac number, because 213111123303 - 2¹⁶ = 213111057767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213111123303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111123373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44386503 + ... + 44391303.

It is an arithmetic number, because the mean of its divisors is an integer number (9584023680).

Almost surely, 2^213111123303 is an apocalyptic number.

213111123303 is a deficient number, since it is larger than the sum of its proper divisors (93577634457).

213111123303 is a wasteful number, since it uses less digits than its factorization.

213111123303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7119.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 213111123303 its reverse (303321111312), we get a palindrome (516432234615).

The spelling of 213111123303 in words is "two hundred thirteen billion, one hundred eleven million, one hundred twenty-three thousand, three hundred three".