103202100130021 has 4 divisors (see below), whose sum is σ = 103202360160012. Its totient is φ = 103201840100032.

The previous prime is 103202100130009. The next prime is 103202100130033. The reversal of 103202100130021 is 120031001202301.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (103202100130009) and next prime (103202100130033).

It can be written as a sum of positive squares in 2 ways, for example, as 96718767084900 + 6483333045121 = 9834570^2 + 2546239^2 .

It is a cyclic number.

It is not a de Polignac number, because 103202100130021 - 2²⁷ = 103201965912293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103202100129977 and 103202100130004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103202100170021) 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, 129418756 + ... + 130213741.

It is an arithmetic number, because the mean of its divisors is an integer number (25800590040003).

Almost surely, 2^{103202100130021} is an apocalyptic number.

It is an amenable number.

103202100130021 is a deficient number, since it is larger than the sum of its proper divisors (260029991).

103202100130021 is an equidigital number, since it uses as much as digits as its factorization.

103202100130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260029990.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 103202100130021 its reverse (120031001202301), we get a palindrome (223233101332322).

The spelling of 103202100130021 in words is "one hundred three trillion, two hundred two billion, one hundred million, one hundred thirty thousand, twenty-one".