2103121321 has 8 divisors (see below), whose sum is σ = 2408293440. Its totient is φ = 1799130768.

The previous prime is 2103121303. The next prime is 2103121327. The reversal of 2103121321 is 1231213012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2103121321 - 2¹⁵ = 2103088553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2103121295 and 2103121304.

It is not an unprimeable number, because it can be changed into a prime (2103121327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291571 + ... + 298696.

It is an arithmetic number, because the mean of its divisors is an integer number (301036680).

Almost surely, 2^2103121321 is an apocalyptic number.

It is an amenable number.

2103121321 is a deficient number, since it is larger than the sum of its proper divisors (305172119).

2103121321 is an equidigital number, since it uses as much as digits as its factorization.

2103121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590783.

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

The square root of 2103121321 is about 45859.8007082456. The cubic root of 2103121321 is about 1281.2133110065.

Adding to 2103121321 its reverse (1231213012), we get a palindrome (3334334333).

The spelling of 2103121321 in words is "two billion, one hundred three million, one hundred twenty-one thousand, three hundred twenty-one".