123123111022 has 16 divisors (see below), whose sum is σ = 201108531600. Its totient is φ = 56310387840.

The previous prime is 123123110953. The next prime is 123123111037. The reversal of 123123111022 is 220111321321.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55862379 + ... + 55864582.

It is an arithmetic number, because the mean of its divisors is an integer number (12569283225).

Almost surely, 2^123123111022 is an apocalyptic number.

123123111022 is a deficient number, since it is larger than the sum of its proper divisors (77985420578).

123123111022 is a wasteful number, since it uses less digits than its factorization.

123123111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111727011.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123123111022 its reverse (220111321321), we get a palindrome (343234432343).

The spelling of 123123111022 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred eleven thousand, twenty-two".