1021023001 has 2 divisors, whose sum is σ = 1021023002. Its totient is φ = 1021023000.

The previous prime is 1021022999. The next prime is 1021023019. The reversal of 1021023001 is 1003201201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553425625 + 467597376 = 23525^2 + 21624^2 .

It is an emirp because it is prime and its reverse (1003201201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021023001 - 2¹ = 1021022999 is a prime.

Together with 1021022999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1021023401) 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, 510511500 + 510511501.

It is an arithmetic number, because the mean of its divisors is an integer number (510511501).

Almost surely, 2^1021023001 is an apocalyptic number.

It is an amenable number.

1021023001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021023001 is an equidigital number, since it uses as much as digits as its factorization.

1021023001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1021023001 is about 31953.4505335496. The cubic root of 1021023001 is about 1006.9591252338.

Adding to 1021023001 its reverse (1003201201), we get a palindrome (2024224202).

The spelling of 1021023001 in words is "one billion, twenty-one million, twenty-three thousand, one".