1021103042 has 4 divisors (see below), whose sum is σ = 1531654566. Its totient is φ = 510551520.

The previous prime is 1021103003. The next prime is 1021103047. The reversal of 1021103042 is 2403011201.

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

It can be written as a sum of positive squares in only one way, i.e., 1013212561 + 7890481 = 31831^2 + 2809^2 .

It is not an unprimeable number, because it can be changed into a prime (1021103047) 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, 255275759 + ... + 255275762.

Almost surely, 2^1021103042 is an apocalyptic number.

1021103042 is a deficient number, since it is larger than the sum of its proper divisors (510551524).

1021103042 is an equidigital number, since it uses as much as digits as its factorization.

1021103042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510551523.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1021103042 is about 31954.7029715502. The cubic root of 1021103042 is about 1006.9854373767.

Adding to 1021103042 its reverse (2403011201), we get a palindrome (3424114243).

The spelling of 1021103042 in words is "one billion, twenty-one million, one hundred three thousand, forty-two".