103110021 has 12 divisors (see below), whose sum is σ = 170213472. Its totient is φ = 58919976.

The previous prime is 103110011. The next prime is 103110037. The reversal of 103110021 is 120011301.

It is not a de Polignac number, because 103110021 - 2¹¹ = 103107973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 103109985 and 103110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103110011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 818271 + ... + 818396.

It is an arithmetic number, because the mean of its divisors is an integer number (14184456).

Almost surely, 2^103110021 is an apocalyptic number.

It is an amenable number.

103110021 is a deficient number, since it is larger than the sum of its proper divisors (67103451).

103110021 is a wasteful number, since it uses less digits than its factorization.

103110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636680 (or 1636677 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 103110021 is about 10154.3104640345. The cubic root of 103110021 is about 468.9216578773.

Adding to 103110021 its reverse (120011301), we get a palindrome (223121322).

The spelling of 103110021 in words is "one hundred three million, one hundred ten thousand, twenty-one".