2121123312203 has 32 divisors (see below), whose sum is σ = 2498378268672. Its totient is φ = 1763050212000.

The previous prime is 2121123312193. The next prime is 2121123312211. The reversal of 2121123312203 is 3022133211212.

It is not a de Polignac number, because 2121123312203 - 2⁸ = 2121123311947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121120312203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85026350 + ... + 85051292.

It is an arithmetic number, because the mean of its divisors is an integer number (78074320896).

Almost surely, 2^{2121123312203} is an apocalyptic number.

2121123312203 is a deficient number, since it is larger than the sum of its proper divisors (377254956469).

2121123312203 is a wasteful number, since it uses less digits than its factorization.

2121123312203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27015.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2121123312203 its reverse (3022133211212), we get a palindrome (5143256523415).

The spelling of 2121123312203 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-three million, three hundred twelve thousand, two hundred three".