103113202021 has 4 divisors (see below), whose sum is σ = 104803582444. Its totient is φ = 101422821600.

The previous prime is 103113201977. The next prime is 103113202043. The reversal of 103113202021 is 120202311301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120202311301 = 19853 ⋅6054617.

It can be written as a sum of positive squares in 2 ways, for example, as 46712176900 + 56401025121 = 216130^2 + 237489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103113202021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103113201986 and 103113202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103113202421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845190120 + ... + 845190241.

It is an arithmetic number, because the mean of its divisors is an integer number (26200895611).

Almost surely, 2^103113202021 is an apocalyptic number.

It is an amenable number.

103113202021 is a deficient number, since it is larger than the sum of its proper divisors (1690380423).

103113202021 is an equidigital number, since it uses as much as digits as its factorization.

103113202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690380422.

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

Adding to 103113202021 its reverse (120202311301), we get a palindrome (223315513322).

The spelling of 103113202021 in words is "one hundred three billion, one hundred thirteen million, two hundred two thousand, twenty-one".