123042111 has 8 divisors (see below), whose sum is σ = 171189120. Its totient is φ = 78461592.

The previous prime is 123042109. The next prime is 123042121. The reversal of 123042111 is 111240321.

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

It is not a de Polignac number, because 123042111 - 2¹ = 123042109 is a prime.

It is a super-2 number, since 2×123042111² = 30278722158672642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123042121) 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, 891541 + ... + 891678.

It is an arithmetic number, because the mean of its divisors is an integer number (21398640).

Almost surely, 2^123042111 is an apocalyptic number.

123042111 is a deficient number, since it is larger than the sum of its proper divisors (48147009).

123042111 is a wasteful number, since it uses less digits than its factorization.

123042111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783245.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 123042111 is about 11092.4348544402. The cubic root of 123042111 is about 497.3757318639.

Adding to 123042111 its reverse (111240321), we get a palindrome (234282432).

The spelling of 123042111 in words is "one hundred twenty-three million, forty-two thousand, one hundred eleven".