123051729020 has 48 divisors (see below), whose sum is σ = 282536892288. Its totient is φ = 44645040960.

The previous prime is 123051728959. The next prime is 123051729041. The reversal of 123051729020 is 20927150321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 533834 + ... + 728753.

It is an arithmetic number, because the mean of its divisors is an integer number (5886185256).

Almost surely, 2^123051729020 is an apocalyptic number.

123051729020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123051729020 is an abundant number, since it is smaller than the sum of its proper divisors (159485163268).

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

123051729020 is a wasteful number, since it uses less digits than its factorization.

123051729020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263050 (or 1263048 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

Adding to 123051729020 its reverse (20927150321), we get a palindrome (143978879341).

The spelling of 123051729020 in words is "one hundred twenty-three billion, fifty-one million, seven hundred twenty-nine thousand, twenty".