120500721 has 12 divisors (see below), whose sum is σ = 189880080. Its totient is φ = 73030680.

The previous prime is 120500719. The next prime is 120500759. The reversal of 120500721 is 127005021.

It is not a de Polignac number, because 120500721 - 2¹ = 120500719 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120500694 and 120500703.

It is not an unprimeable number, because it can be changed into a prime (120500701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608491 + ... + 608688.

It is an arithmetic number, because the mean of its divisors is an integer number (15823340).

Almost surely, 2^120500721 is an apocalyptic number.

120500721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120500721 is a deficient number, since it is larger than the sum of its proper divisors (69379359).

120500721 is a wasteful number, since it uses less digits than its factorization.

120500721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217196 (or 1217193 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 120500721 is about 10977.2820406510. The cubic root of 120500721 is about 493.9275096197.

Adding to 120500721 its reverse (127005021), we get a palindrome (247505742).

The spelling of 120500721 in words is "one hundred twenty million, five hundred thousand, seven hundred twenty-one".