123011615420 has 48 divisors (see below), whose sum is σ = 263007954720. Its totient is φ = 48317178624.

The previous prime is 123011615413. The next prime is 123011615429. The reversal of 123011615420 is 24516110321.

It is a self number, because there is not a number n which added to its sum of digits gives 123011615420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011615429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279986 + ... + 569574.

It is an arithmetic number, because the mean of its divisors is an integer number (5479332390).

Almost surely, 2^123011615420 is an apocalyptic number.

123011615420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123011615420 is an abundant number, since it is smaller than the sum of its proper divisors (139996339300).

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

123011615420 is a wasteful number, since it uses less digits than its factorization.

123011615420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289982 (or 289980 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 123011615420 its reverse (24516110321), we get a palindrome (147527725741).

The spelling of 123011615420 in words is "one hundred twenty-three billion, eleven million, six hundred fifteen thousand, four hundred twenty".