2121121212203 has 16 divisors (see below), whose sum is σ = 2551765248000. Its totient is φ = 1722386892672.

The previous prime is 2121121212193. The next prime is 2121121212209. The reversal of 2121121212203 is 3022121211212.

It is a cyclic number.

It is not a de Polignac number, because 2121121212203 - 2⁶ = 2121121212139 is a prime.

It is a super-2 number, since 2×2121121212203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121121212209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15771878 + ... + 15905796.

It is an arithmetic number, because the mean of its divisors is an integer number (159485328000).

Almost surely, 2^{2121121212203} is an apocalyptic number.

2121121212203 is a deficient number, since it is larger than the sum of its proper divisors (430644035797).

2121121212203 is a wasteful number, since it uses less digits than its factorization.

2121121212203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253034.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2121121212203 its reverse (3022121211212), we get a palindrome (5143242423415).

Subtracting 2121121212203 from its reverse (3022121211212), we obtain a palindrome (900999999009).

The spelling of 2121121212203 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred three".