2121120312203 has 2 divisors, whose sum is σ = 2121120312204. Its totient is φ = 2121120312202.

The previous prime is 2121120312163. The next prime is 2121120312221. The reversal of 2121120312203 is 3022130211212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121120312203 - 2¹⁰ = 2121120311179 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121120362203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060560156101 + 1060560156102.

It is an arithmetic number, because the mean of its divisors is an integer number (1060560156102).

Almost surely, 2^{2121120312203} is an apocalyptic number.

2121120312203 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121120312203 is an equidigital number, since it uses as much as digits as its factorization.

2121120312203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2121120312203 its reverse (3022130211212), we get a palindrome (5143250523415).

The spelling of 2121120312203 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, three hundred twelve thousand, two hundred three".