102111200202101 has 4 divisors (see below), whose sum is σ = 102311811597900. Its totient is φ = 101910588806304.

The previous prime is 102111200202091. The next prime is 102111200202157. The reversal of 102111200202101 is 101202002111201.

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 60419513454001 + 41691686748100 = 7772999^2 + 6456910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102111200202101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111203202101) 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, 100305697136 + ... + 100305698153.

It is an arithmetic number, because the mean of its divisors is an integer number (25577952899475).

Almost surely, 2^{102111200202101} is an apocalyptic number.

It is an amenable number.

102111200202101 is a deficient number, since it is larger than the sum of its proper divisors (200611395799).

102111200202101 is an equidigital number, since it uses as much as digits as its factorization.

102111200202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200611395798.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102111200202101 its reverse (101202002111201), we get a palindrome (203313202313302).

The spelling of 102111200202101 in words is "one hundred two trillion, one hundred eleven billion, two hundred million, two hundred two thousand, one hundred one".