2121111203 has 4 divisors (see below), whose sum is σ = 2121229608. Its totient is φ = 2120992800.

The previous prime is 2121111193. The next prime is 2121111217. The reversal of 2121111203 is 3021111212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121111203 is a prime.

It is a super-2 number, since 2×2121111203² = 8998225470984214418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121111253) 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 3 ways as a sum of consecutive naturals, for example, 26198 + ... + 70203.

It is an arithmetic number, because the mean of its divisors is an integer number (530307402).

Almost surely, 2^2121111203 is an apocalyptic number.

2121111203 is a deficient number, since it is larger than the sum of its proper divisors (118405).

2121111203 is an equidigital number, since it uses as much as digits as its factorization.

2121111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118404.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2121111203 is about 46055.5230455588. The cubic root of 2121111203 is about 1284.8560660800.

Adding to 2121111203 its reverse (3021111212), we get a palindrome (5142222415).

Subtracting 2121111203 from its reverse (3021111212), we obtain a palindrome (900000009).

The spelling of 2121111203 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred three".