120013213021 has 4 divisors (see below), whose sum is σ = 129244998652. Its totient is φ = 110781427392.

The previous prime is 120013213003. The next prime is 120013213027. The reversal of 120013213021 is 120312310021.

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 67320010521 + 52693202500 = 259461^2 + 229550^2 .

It is a cyclic number.

It is not a de Polignac number, because 120013213021 - 2¹¹ = 120013210973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120013212986 and 120013213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120013213027) 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, 4615892796 + ... + 4615892821.

It is an arithmetic number, because the mean of its divisors is an integer number (32311249663).

Almost surely, 2^120013213021 is an apocalyptic number.

It is an amenable number.

120013213021 is a deficient number, since it is larger than the sum of its proper divisors (9231785631).

120013213021 is an equidigital number, since it uses as much as digits as its factorization.

120013213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231785630.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 120013213021 its reverse (120312310021), we get a palindrome (240325523042).

The spelling of 120013213021 in words is "one hundred twenty billion, thirteen million, two hundred thirteen thousand, twenty-one".