123011153340 has 96 divisors (see below), whose sum is σ = 349340330304. Its totient is φ = 32338083840.

The previous prime is 123011153333. The next prime is 123011153359. The reversal of 123011153340 is 43351110321.

It is a self number, because there is not a number n which added to its sum of digits gives 123011153340.

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, 1454620 + ... + 1536860.

It is an arithmetic number, because the mean of its divisors is an integer number (3638961774).

Almost surely, 2^123011153340 is an apocalyptic number.

123011153340 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 123011153340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174670165152).

123011153340 is an abundant number, since it is smaller than the sum of its proper divisors (226329176964).

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

123011153340 is a wasteful number, since it uses less digits than its factorization.

123011153340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82607 (or 82605 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 123011153340 its reverse (43351110321), we get a palindrome (166362263661).

The spelling of 123011153340 in words is "one hundred twenty-three billion, eleven million, one hundred fifty-three thousand, three hundred forty".