2103412521 has 16 divisors (see below), whose sum is σ = 3221987328. Its totient is φ = 1195654800.

The previous prime is 2103412513. The next prime is 2103412523. The reversal of 2103412521 is 1252143012.

It is not a de Polignac number, because 2103412521 - 2³ = 2103412513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2103412523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258195 + ... + 266216.

It is an arithmetic number, because the mean of its divisors is an integer number (201374208).

Almost surely, 2^2103412521 is an apocalyptic number.

2103412521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2103412521 is a deficient number, since it is larger than the sum of its proper divisors (1118574807).

2103412521 is a wasteful number, since it uses less digits than its factorization.

2103412521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524612.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2103412521 is about 45862.9754922203. The cubic root of 2103412521 is about 1281.2724409125.

Adding to 2103412521 its reverse (1252143012), we get a palindrome (3355555533).

The spelling of 2103412521 in words is "two billion, one hundred three million, four hundred twelve thousand, five hundred twenty-one".