2121203331211 has 4 divisors (see below), whose sum is σ = 2121206268592. Its totient is φ = 2121200393832.

The previous prime is 2121203331199. The next prime is 2121203331217. The reversal of 2121203331211 is 1121333021212.

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 not a de Polignac number, because 2121203331211 - 2⁹ = 2121203330699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121203331217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450346 + ... + 2108368.

It is an arithmetic number, because the mean of its divisors is an integer number (530301567148).

Almost surely, 2^{2121203331211} is an apocalyptic number.

2121203331211 is a deficient number, since it is larger than the sum of its proper divisors (2937381).

2121203331211 is a wasteful number, since it uses less digits than its factorization.

2121203331211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937380.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2121203331211 its reverse (1121333021212), we get a palindrome (3242536352423).

The spelling of 2121203331211 in words is "two trillion, one hundred twenty-one billion, two hundred three million, three hundred thirty-one thousand, two hundred eleven".