2101210001 has 12 divisors (see below), whose sum is σ = 2310068112. Its totient is φ = 1895439000.

The previous prime is 2101209967. The next prime is 2101210009. The reversal of 2101210001 is 1000121012.

It is not a de Polignac number, because 2101210001 - 2³⁰ = 1027468177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101210009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183206 + ... + 194336.

It is an arithmetic number, because the mean of its divisors is an integer number (192505676).

Almost surely, 2^2101210001 is an apocalyptic number.

It is an amenable number.

2101210001 is a deficient number, since it is larger than the sum of its proper divisors (208858111).

2101210001 is a wasteful number, since it uses less digits than its factorization.

2101210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11404 (or 11273 counting only the distinct ones).

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

The square root of 2101210001 is about 45838.9572416302. The cubic root of 2101210001 is about 1280.8250704736.

Adding to 2101210001 its reverse (1000121012), we get a palindrome (3101331013).

It can be divided in two parts, 21012 and 10001, that multiplied together give a palindrome (210141012).

The spelling of 2101210001 in words is "two billion, one hundred one million, two hundred ten thousand, one".