213111123304 has 8 divisors (see below), whose sum is σ = 399583356210. Its totient is φ = 106555561648.

The previous prime is 213111123263. The next prime is 213111123317. The reversal of 213111123304 is 403321111312.

It can be written as a sum of positive squares in only one way, i.e., 107388600804 + 105722522500 = 327702^2 + 325150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13319445199 + ... + 13319445214.

Almost surely, 2^213111123304 is an apocalyptic number.

It is an amenable number.

213111123304 is a deficient number, since it is larger than the sum of its proper divisors (186472232906).

213111123304 is a wasteful number, since it uses less digits than its factorization.

213111123304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26638890419 (or 26638890415 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 213111123304 its reverse (403321111312), we get a palindrome (616432234616).

The spelling of 213111123304 in words is "two hundred thirteen billion, one hundred eleven million, one hundred twenty-three thousand, three hundred four".