123111141332440 has 128 divisors (see below), whose sum is σ = 285725470464000. Its totient is φ = 47704934527488.

The previous prime is 123111141332371. The next prime is 123111141332497. The reversal of 123111141332440 is 44233141111321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2341246389 + ... + 2341298971.

It is an arithmetic number, because the mean of its divisors is an integer number (2232230238000).

Almost surely, 2^{123111141332440} is an apocalyptic number.

123111141332440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123111141332440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142862735232000).

123111141332440 is an abundant number, since it is smaller than the sum of its proper divisors (162614329131560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123111141332440 is a wasteful number, since it uses less digits than its factorization.

123111141332440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59489 (or 59485 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 123111141332440 its reverse (44233141111321), we get a palindrome (167344282443761).

The spelling of 123111141332440 in words is "one hundred twenty-three trillion, one hundred eleven billion, one hundred forty-one million, three hundred thirty-two thousand, four hundred forty".