123111221243 has 8 divisors (see below), whose sum is σ = 126275922000. Its totient is φ = 119977700128.

The previous prime is 123111221213. The next prime is 123111221249. The reversal of 123111221243 is 342122111321.

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 123111221243 - 2¹² = 123111217147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123111221249) 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, 7786913 + ... + 7802706.

It is an arithmetic number, because the mean of its divisors is an integer number (15784490250).

Almost surely, 2^123111221243 is an apocalyptic number.

123111221243 is a deficient number, since it is larger than the sum of its proper divisors (3164700757).

123111221243 is a wasteful number, since it uses less digits than its factorization.

123111221243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15589821.

The product of its digits is 576, while the sum is 23.

Adding to 123111221243 its reverse (342122111321), we get a palindrome (465233332564).

The spelling of 123111221243 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred twenty-one thousand, two hundred forty-three".