2101201202101 has 4 divisors (see below), whose sum is σ = 2101210727500. Its totient is φ = 2101191676704.

The previous prime is 2101201202077. The next prime is 2101201202117. The reversal of 2101201202101 is 1012021021012.

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 1149891628900 + 951309573201 = 1072330^2 + 975351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101201202101 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 (2101201202501) 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, 4423776 + ... + 4875673.

It is an arithmetic number, because the mean of its divisors is an integer number (525302681875).

Almost surely, 2^{2101201202101} is an apocalyptic number.

It is an amenable number.

2101201202101 is a deficient number, since it is larger than the sum of its proper divisors (9525399).

2101201202101 is an equidigital number, since it uses as much as digits as its factorization.

2101201202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9525398.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101201202101 its reverse (1012021021012), we get a palindrome (3113222223113).

The spelling of 2101201202101 in words is "two trillion, one hundred one billion, two hundred one million, two hundred two thousand, one hundred one".