202102011101 has 4 divisors (see below), whose sum is σ = 202355590332. Its totient is φ = 201848431872.

The previous prime is 202102011079. The next prime is 202102011121. The reversal of 202102011101 is 101110201202.

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 151923771076 + 50178240025 = 389774^2 + 224005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202102011101 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 (202102011121) 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, 126788420 + ... + 126790013.

It is an arithmetic number, because the mean of its divisors is an integer number (50588897583).

Almost surely, 2^202102011101 is an apocalyptic number.

It is an amenable number.

202102011101 is a deficient number, since it is larger than the sum of its proper divisors (253579231).

202102011101 is an equidigital number, since it uses as much as digits as its factorization.

202102011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253579230.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 202102011101 its reverse (101110201202), we get a palindrome (303212212303).

The spelling of 202102011101 in words is "two hundred two billion, one hundred two million, eleven thousand, one hundred one".