120135321840 has 40 divisors (see below), whose sum is σ = 372419498448. Its totient is φ = 32036085760.

The previous prime is 120135321811. The next prime is 120135321851. The reversal of 120135321840 is 48123531021.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 120135321798 and 120135321807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250281681 + ... + 250282160.

Almost surely, 2^120135321840 is an apocalyptic number.

120135321840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120135321840 is an abundant number, since it is smaller than the sum of its proper divisors (252284176608).

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

120135321840 is a wasteful number, since it uses less digits than its factorization.

120135321840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500563857 (or 500563851 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 120135321840 its reverse (48123531021), we get a palindrome (168258852861).

The spelling of 120135321840 in words is "one hundred twenty billion, one hundred thirty-five million, three hundred twenty-one thousand, eight hundred forty".