1021312442 has 8 divisors (see below), whose sum is σ = 1532193300. Its totient is φ = 510581344.

The previous prime is 1021312433. The next prime is 1021312471. The reversal of 1021312442 is 2442131201.

It can be written as a sum of positive squares in 2 ways, for example, as 711235561 + 310076881 = 26669^2 + 17609^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18467 + ... + 48822.

Almost surely, 2^1021312442 is an apocalyptic number.

1021312442 is a deficient number, since it is larger than the sum of its proper divisors (510880858).

1021312442 is an equidigital number, since it uses as much as digits as its factorization.

1021312442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74880.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1021312442 is about 31957.9793165963. The cubic root of 1021312442 is about 1007.0542676284.

Adding to 1021312442 its reverse (2442131201), we get a palindrome (3463443643).

The spelling of 1021312442 in words is "one billion, twenty-one million, three hundred twelve thousand, four hundred forty-two".