2101121203 has 4 divisors (see below), whose sum is σ = 2101495968. Its totient is φ = 2100746440.

The previous prime is 2101121177. The next prime is 2101121207. The reversal of 2101121203 is 3021211012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101121203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101121207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178843 + ... + 190228.

It is an arithmetic number, because the mean of its divisors is an integer number (525373992).

Almost surely, 2^2101121203 is an apocalyptic number.

2101121203 is a deficient number, since it is larger than the sum of its proper divisors (374765).

2101121203 is an equidigital number, since it uses as much as digits as its factorization.

2101121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374764.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2101121203 is about 45837.9886447911. The cubic root of 2101121203 is about 1280.8070274878.

Adding to 2101121203 its reverse (3021211012), we get a palindrome (5122332215).

The spelling of 2101121203 in words is "two billion, one hundred one million, one hundred twenty-one thousand, two hundred three".