31230120442 has 8 divisors (see below), whose sum is σ = 47039559732. Its totient is φ = 15550267200.

The previous prime is 31230120377. The next prime is 31230120457. The reversal of 31230120442 is 24402103213.

It can be written as a sum of positive squares in 2 ways, for example, as 24267719961 + 6962400481 = 155781^2 + 83441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32395909 + ... + 32396872.

Almost surely, 2^31230120442 is an apocalyptic number.

31230120442 is a deficient number, since it is larger than the sum of its proper divisors (15809439290).

31230120442 is a wasteful number, since it uses less digits than its factorization.

31230120442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64793024.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31230120442 its reverse (24402103213), we get a palindrome (55632223655).

The spelling of 31230120442 in words is "thirty-one billion, two hundred thirty million, one hundred twenty thousand, four hundred forty-two".