120521930 has 16 divisors (see below), whose sum is σ = 217304424. Its totient is φ = 48127680.

The previous prime is 120521923. The next prime is 120521939. The reversal of 120521930 is 39125021.

It can be written as a sum of positive squares in 4 ways, for example, as 58537801 + 61984129 = 7651^2 + 7873^2 .

It is a super-2 number, since 2×120521930² = 29051071221849800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120521896 and 120521905.

It is not an unprimeable number, because it can be changed into a prime (120521939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3701 + ... + 15960.

Almost surely, 2^120521930 is an apocalyptic number.

120521930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120521930 is a deficient number, since it is larger than the sum of its proper divisors (96782494).

120521930 is a wasteful number, since it uses less digits than its factorization.

120521930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20281.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 120521930 is about 10978.2480387355. The cubic root of 120521930 is about 493.9564861933.

Adding to 120521930 its reverse (39125021), we get a palindrome (159646951).

The spelling of 120521930 in words is "one hundred twenty million, five hundred twenty-one thousand, nine hundred thirty".