123012203512240 has 160 divisors (see below), whose sum is σ = 335610119577600. Its totient is φ = 41051467315200.

The previous prime is 123012203512207. The next prime is 123012203512241. The reversal of 123012203512240 is 42215302210321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 123012203512199 and 123012203512208.

It is not an unprimeable number, because it can be changed into a prime (123012203512241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3680361 + ... + 16111159.

It is an arithmetic number, because the mean of its divisors is an integer number (2097563247360).

Almost surely, 2^{123012203512240} is an apocalyptic number.

123012203512240 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 123012203512240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167805059788800).

123012203512240 is an abundant number, since it is smaller than the sum of its proper divisors (212597916065360).

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

123012203512240 is a wasteful number, since it uses less digits than its factorization.

123012203512240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431291 (or 12431285 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 123012203512240 its reverse (42215302210321), we get a palindrome (165227505722561).

The spelling of 123012203512240 in words is "one hundred twenty-three trillion, twelve billion, two hundred three million, five hundred twelve thousand, two hundred forty".