2103502121 has 4 divisors (see below), whose sum is σ = 2404002432. Its totient is φ = 1803001812.

The previous prime is 2103502109. The next prime is 2103502129. The reversal of 2103502121 is 1212053012.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 2103502121 - 2⁶ = 2103502057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2103502121.

It is not an unprimeable number, because it can be changed into a prime (2103502129) 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, 150250145 + ... + 150250158.

It is an arithmetic number, because the mean of its divisors is an integer number (601000608).

Almost surely, 2^2103502121 is an apocalyptic number.

It is an amenable number.

2103502121 is a deficient number, since it is larger than the sum of its proper divisors (300500311).

2103502121 is an equidigital number, since it uses as much as digits as its factorization.

2103502121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300500310.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2103502121 is about 45863.9523046150. The cubic root of 2103502121 is about 1281.2906336318.

Adding to 2103502121 its reverse (1212053012), we get a palindrome (3315555133).

The spelling of 2103502121 in words is "two billion, one hundred three million, five hundred two thousand, one hundred twenty-one".