213111320123 has 8 divisors (see below), whose sum is σ = 229521417216. Its totient is φ = 196703640000.

The previous prime is 213111320117. The next prime is 213111320189. The reversal of 213111320123 is 321023111312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213111320123 - 2²⁴ = 213094542907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213111320095 and 213111320104.

It is not an unprimeable number, because it can be changed into a prime (213111320923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419003 + ... + 775748.

It is an arithmetic number, because the mean of its divisors is an integer number (28690177152).

Almost surely, 2^213111320123 is an apocalyptic number.

213111320123 is a deficient number, since it is larger than the sum of its proper divisors (16410097093).

213111320123 is a wasteful number, since it uses less digits than its factorization.

213111320123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208485.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 213111320123 its reverse (321023111312), we get a palindrome (534134431435).

The spelling of 213111320123 in words is "two hundred thirteen billion, one hundred eleven million, three hundred twenty thousand, one hundred twenty-three".