120031213 has 2 divisors, whose sum is σ = 120031214. Its totient is φ = 120031212.

The previous prime is 120031211. The next prime is 120031229. The reversal of 120031213 is 312130021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105308644 + 14722569 = 10262^2 + 3837^2 .

It is a cyclic number.

It is not a de Polignac number, because 120031213 - 2¹ = 120031211 is a prime.

Together with 120031211, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 120031193 and 120031202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120031211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60015606 + 60015607.

It is an arithmetic number, because the mean of its divisors is an integer number (60015607).

Almost surely, 2^120031213 is an apocalyptic number.

It is an amenable number.

120031213 is a deficient number, since it is larger than the sum of its proper divisors (1).

120031213 is an equidigital number, since it uses as much as digits as its factorization.

120031213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 120031213 is about 10955.8757294887. The cubic root of 120031213 is about 493.2851766462.

Adding to 120031213 its reverse (312130021), we get a palindrome (432161234).

The spelling of 120031213 in words is "one hundred twenty million, thirty-one thousand, two hundred thirteen".