2101011001 has 8 divisors (see below), whose sum is σ = 2142853704. Its totient is φ = 2059249920.

The previous prime is 2101010987. The next prime is 2101011047. The reversal of 2101011001 is 1001101012.

It can be written as a sum of positive squares in 4 ways, for example, as 417139776 + 1683871225 = 20424^2 + 41035^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2101011001 - 2¹¹ = 2101008953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101011091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32961 + ... + 72721.

It is an arithmetic number, because the mean of its divisors is an integer number (267856713).

Almost surely, 2^2101011001 is an apocalyptic number.

It is an amenable number.

2101011001 is a deficient number, since it is larger than the sum of its proper divisors (41842703).

2101011001 is an equidigital number, since it uses as much as digits as its factorization.

2101011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40811.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 2101011001 is about 45836.7865474883. The cubic root of 2101011001 is about 1280.7846346873.

Adding to 2101011001 its reverse (1001101012), we get a palindrome (3102112013).

The spelling of 2101011001 in words is "two billion, one hundred one million, eleven thousand, one".