1020211001 has 4 divisors (see below), whose sum is σ = 1021892352. Its totient is φ = 1018529652.

The previous prime is 1020210973. The next prime is 1020211013. The reversal of 1020211001 is 1001120201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1020211001 - 2⁶ = 1020210937 is a prime.

It is a super-2 number, since 2×1020211001² = 2081660973122844002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020211001.

It is not an unprimeable number, because it can be changed into a prime (1020211051) 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 3 ways as a sum of consecutive naturals, for example, 839765 + ... + 840978.

It is an arithmetic number, because the mean of its divisors is an integer number (255473088).

Almost surely, 2^1020211001 is an apocalyptic number.

It is an amenable number.

1020211001 is a deficient number, since it is larger than the sum of its proper divisors (1681351).

1020211001 is an equidigital number, since it uses as much as digits as its factorization.

1020211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681350.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1020211001 is about 31940.7420233156. The cubic root of 1020211001 is about 1006.6921160157.

Adding to 1020211001 its reverse (1001120201), we get a palindrome (2021331202).

The spelling of 1020211001 in words is "one billion, twenty million, two hundred eleven thousand, one".