10103100021 has 24 divisors (see below), whose sum is σ = 16689953280. Its totient is φ = 5769108576.

The previous prime is 10103099987. The next prime is 10103100023. The reversal of 10103100021 is 12000130101.

It is not a de Polignac number, because 10103100021 - 2¹⁴ = 10103083637 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10103099976 and 10103100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10103100023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33916 + ... + 146138.

It is an arithmetic number, because the mean of its divisors is an integer number (695414720).

Almost surely, 2^10103100021 is an apocalyptic number.

It is an amenable number.

10103100021 is a deficient number, since it is larger than the sum of its proper divisors (6586853259).

10103100021 is a wasteful number, since it uses less digits than its factorization.

10103100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113665 (or 113662 counting only the distinct ones).

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

Adding to 10103100021 its reverse (12000130101), we get a palindrome (22103230122).

The spelling of 10103100021 in words is "ten billion, one hundred three million, one hundred thousand, twenty-one".