2101202101 has 4 divisors (see below), whose sum is σ = 2101595692. Its totient is φ = 2100808512.

The previous prime is 2101202093. The next prime is 2101202107. The reversal of 2101202101 is 1012021012.

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 232715025 + 1868487076 = 15255^2 + 43226^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101202101 - 2³ = 2101202093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101202107) 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, 188676 + ... + 199501.

It is an arithmetic number, because the mean of its divisors is an integer number (525398923).

Almost surely, 2^2101202101 is an apocalyptic number.

It is an amenable number.

2101202101 is a deficient number, since it is larger than the sum of its proper divisors (393591).

2101202101 is an equidigital number, since it uses as much as digits as its factorization.

2101202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393590.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2101202101 is about 45838.8710703045. The cubic root of 2101202101 is about 1280.8234652825.

Adding to 2101202101 its reverse (1012021012), we get a palindrome (3113223113).

It can be divided in two parts, 2 and 101202101, that multiplied together give a palindrome (202404202).

The spelling of 2101202101 in words is "two billion, one hundred one million, two hundred two thousand, one hundred one".