1021102442 has 4 divisors (see below), whose sum is σ = 1531653666. Its totient is φ = 510551220.

The previous prime is 1021102421. The next prime is 1021102451. The reversal of 1021102442 is 2442011201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2442011201 = 7 ⋅348858743.

It can be written as a sum of positive squares in only one way, i.e., 609053041 + 412049401 = 24679^2 + 20299^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021102442.

It is an unprimeable number.

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, 255275609 + ... + 255275612.

Almost surely, 2^1021102442 is an apocalyptic number.

1021102442 is a deficient number, since it is larger than the sum of its proper divisors (510551224).

1021102442 is an equidigital number, since it uses as much as digits as its factorization.

1021102442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510551223.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1021102442 is about 31954.6935832594. The cubic root of 1021102442 is about 1006.9852401419.

Adding to 1021102442 its reverse (2442011201), we get a palindrome (3463113643).

The spelling of 1021102442 in words is "one billion, twenty-one million, one hundred two thousand, four hundred forty-two".