120300021 has 12 divisors (see below), whose sum is σ = 174729100. Its totient is φ = 79755840.

The previous prime is 120299999. The next prime is 120300127. The reversal of 120300021 is 120003021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 46580625 + 73719396 = 6825^2 + 8586^2 .

It is not a de Polignac number, because 120300021 - 2¹⁴ = 120283637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120299976 and 120300012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120301021) 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, 35296 + ... + 38553.

Almost surely, 2^120300021 is an apocalyptic number.

It is an amenable number.

120300021 is a deficient number, since it is larger than the sum of its proper divisors (54429079).

120300021 is a wasteful number, since it uses less digits than its factorization.

120300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74036 (or 74033 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 120300021 is about 10968.1366238755. The cubic root of 120300021 is about 493.6531368819.

Adding to 120300021 its reverse (120003021), we get a palindrome (240303042).

It can be divided in two parts, 1203000 and 21, that added together give a palindrome (1203021).

The spelling of 120300021 in words is "one hundred twenty million, three hundred thousand, twenty-one".