123111222213 has 8 divisors (see below), whose sum is σ = 187598052928. Its totient is φ = 70349269824.

The previous prime is 123111222187. The next prime is 123111222233. The reversal of 123111222213 is 312222111321.

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

It is not a de Polignac number, because 123111222213 - 2¹³ = 123111214021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5862439153 = 123111222213 / (1 + 2 + 3 + 1 + 1 + 1 + 2 + 2 + 2 + 2 + 1 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123111222213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123111222233) 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, 2931219556 + ... + 2931219597.

It is an arithmetic number, because the mean of its divisors is an integer number (23449756616).

Almost surely, 2^123111222213 is an apocalyptic number.

It is an amenable number.

123111222213 is a deficient number, since it is larger than the sum of its proper divisors (64486830715).

123111222213 is an equidigital number, since it uses as much as digits as its factorization.

123111222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5862439163.

The product of its digits is 288, while the sum is 21.

Adding to 123111222213 its reverse (312222111321), we get a palindrome (435333333534).

The spelling of 123111222213 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred twenty-two thousand, two hundred thirteen".