2101002201 has 6 divisors (see below), whose sum is σ = 3034780970. Its totient is φ = 1400668128.

The previous prime is 2101002193. The next prime is 2101002223. The reversal of 2101002201 is 1022001012.

It can be written as a sum of positive squares in only one way, i.e., 2061614025 + 39388176 = 45405^2 + 6276^2 .

It is not a de Polignac number, because 2101002201 - 2³ = 2101002193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 233444689 = 2101002201 / (2 + 1 + 0 + 1 + 0 + 0 + 2 + 2 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101002301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116722336 + ... + 116722353.

Almost surely, 2^2101002201 is an apocalyptic number.

It is an amenable number.

2101002201 is a deficient number, since it is larger than the sum of its proper divisors (933778769).

2101002201 is a wasteful number, since it uses less digits than its factorization.

2101002201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233444695 (or 233444692 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2101002201 is about 45836.6905546201. The cubic root of 2101002201 is about 1280.7828465131.

Adding to 2101002201 its reverse (1022001012), we get a palindrome (3123003213).

The spelling of 2101002201 in words is "two billion, one hundred one million, two thousand, two hundred one".