1010001021 has 8 divisors (see below), whose sum is σ = 1362893280. Its totient is φ = 665221392.

The previous prime is 1010000983. The next prime is 1010001023. The reversal of 1010001021 is 1201000101.

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

It is not a de Polignac number, because 1010001021 - 2¹¹ = 1009998973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010001023) 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 in 7 ways as a sum of consecutive naturals, for example, 2027866 + ... + 2028363.

It is an arithmetic number, because the mean of its divisors is an integer number (170361660).

Almost surely, 2^1010001021 is an apocalyptic number.

It is an amenable number.

1010001021 is a deficient number, since it is larger than the sum of its proper divisors (352892259).

1010001021 is an equidigital number, since it uses as much as digits as its factorization.

1010001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056315.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 1010001021 is about 31780.5132274480. The cubic root of 1010001021 is about 1003.3226216252.

Adding to 1010001021 its reverse (1201000101), we get a palindrome (2211001122).

The spelling of 1010001021 in words is "one billion, ten million, one thousand, twenty-one".