1021442001 has 8 divisors (see below), whose sum is σ = 1382250144. Its totient is φ = 670797600.

The previous prime is 1021441999. The next prime is 1021442021. The reversal of 1021442001 is 1002441201.

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

It is not a de Polignac number, because 1021442001 - 2¹ = 1021441999 is a prime.

It is a super-2 number, since 2×1021442001² = 2086687522813768002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021442021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2540700 + ... + 2541101.

It is an arithmetic number, because the mean of its divisors is an integer number (172781268).

Almost surely, 2^1021442001 is an apocalyptic number.

It is an amenable number.

1021442001 is a deficient number, since it is larger than the sum of its proper divisors (360808143).

1021442001 is an equidigital number, since it uses as much as digits as its factorization.

1021442001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081871.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1021442001 is about 31960.0062734662. The cubic root of 1021442001 is about 1007.0968492524.

Adding to 1021442001 its reverse (1002441201), we get a palindrome (2023883202).

The spelling of 1021442001 in words is "one billion, twenty-one million, four hundred forty-two thousand, one".