2102121303 has 4 divisors (see below), whose sum is σ = 2802828408. Its totient is φ = 1401414200.

The previous prime is 2102121299. The next prime is 2102121311. The reversal of 2102121303 is 3031212012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102121303 - 2² = 2102121299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102121103) 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, 350353548 + ... + 350353553.

It is an arithmetic number, because the mean of its divisors is an integer number (700707102).

Almost surely, 2^2102121303 is an apocalyptic number.

2102121303 is a deficient number, since it is larger than the sum of its proper divisors (700707105).

2102121303 is an equidigital number, since it uses as much as digits as its factorization.

2102121303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700707104.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2102121303 is about 45848.8964207428. The cubic root of 2102121303 is about 1281.0102097895.

Adding to 2102121303 its reverse (3031212012), we get a palindrome (5133333315).

It can be divided in two parts, 21021 and 21303, that added together give a palindrome (42324).

The spelling of 2102121303 in words is "two billion, one hundred two million, one hundred twenty-one thousand, three hundred three".