120424021321 has 4 divisors (see below), whose sum is σ = 120505335444. Its totient is φ = 120342707200.

The previous prime is 120424021279. The next prime is 120424021339. The reversal of 120424021321 is 123120424021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42059857225 + 78364164096 = 205085^2 + 279936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120424021321 is a prime.

It is a super-2 number, since 2×120424021321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120424021292 and 120424021301.

It is not an unprimeable number, because it can be changed into a prime (120424022321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40654840 + ... + 40657801.

It is an arithmetic number, because the mean of its divisors is an integer number (30126333861).

Almost surely, 2^120424021321 is an apocalyptic number.

It is an amenable number.

120424021321 is a deficient number, since it is larger than the sum of its proper divisors (81314123).

120424021321 is an equidigital number, since it uses as much as digits as its factorization.

120424021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81314122.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 120424021321 its reverse (123120424021), we get a palindrome (243544445342).

The spelling of 120424021321 in words is "one hundred twenty billion, four hundred twenty-four million, twenty-one thousand, three hundred twenty-one".