2101101001 has 4 divisors (see below), whose sum is σ = 2115202500. Its totient is φ = 2086999504.

The previous prime is 2101100999. The next prime is 2101101029. The reversal of 2101101001 is 1001011012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 956293776 + 1144807225 = 30924^2 + 33835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101101001 - 2¹ = 2101100999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101101031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7050526 + ... + 7050823.

It is an arithmetic number, because the mean of its divisors is an integer number (528800625).

Almost surely, 2^2101101001 is an apocalyptic number.

It is an amenable number.

2101101001 is a deficient number, since it is larger than the sum of its proper divisors (14101499).

2101101001 is a wasteful number, since it uses less digits than its factorization.

2101101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14101498.

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

The square root of 2101101001 is about 45837.7682811893. The cubic root of 2101101001 is about 1280.8029225451.

Adding to 2101101001 its reverse (1001011012), we get a palindrome (3102112013).

The spelling of 2101101001 in words is "two billion, one hundred one million, one hundred one thousand, one".