1020210001 has 4 divisors (see below), whose sum is σ = 1080222372. Its totient is φ = 960197632.

The previous prime is 1020209987. The next prime is 1020210019. The reversal of 1020210001 is 1000120201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1000120201 = 23 ⋅43483487.

It can be written as a sum of positive squares in 2 ways, for example, as 317694976 + 702515025 = 17824^2 + 26505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020210001 - 2¹¹ = 1020207953 is a prime.

It is a super-2 number, since 2×1020210001² = 2081656892280840002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020210101) 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 3 ways as a sum of consecutive naturals, for example, 30006160 + ... + 30006193.

It is an arithmetic number, because the mean of its divisors is an integer number (270055593).

Almost surely, 2^1020210001 is an apocalyptic number.

It is an amenable number.

1020210001 is a deficient number, since it is larger than the sum of its proper divisors (60012371).

1020210001 is an equidigital number, since it uses as much as digits as its factorization.

1020210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60012370.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1020210001 is about 31940.7263693235. The cubic root of 1020210001 is about 1006.6917870993.

Adding to 1020210001 its reverse (1000120201), we get a palindrome (2020330202).

The spelling of 1020210001 in words is "one billion, twenty million, two hundred ten thousand, one".