103120310021 has 4 divisors (see below), whose sum is σ = 103149386112. Its totient is φ = 103091233932.

The previous prime is 103120310017. The next prime is 103120310039. The reversal of 103120310021 is 120013021301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120013021301 = 41 ⋅2927146861.

It is a cyclic number.

It is not a de Polignac number, because 103120310021 - 2² = 103120310017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103120309978 and 103120310005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103120310621) 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, 14532725 + ... + 14539818.

It is an arithmetic number, because the mean of its divisors is an integer number (25787346528).

Almost surely, 2^103120310021 is an apocalyptic number.

It is an amenable number.

103120310021 is a deficient number, since it is larger than the sum of its proper divisors (29076091).

103120310021 is an equidigital number, since it uses as much as digits as its factorization.

103120310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29076090.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 103120310021 its reverse (120013021301), we get a palindrome (223133331322).

The spelling of 103120310021 in words is "one hundred three billion, one hundred twenty million, three hundred ten thousand, twenty-one".