2121213133111 has 4 divisors (see below), whose sum is σ = 2121875394552. Its totient is φ = 2120550871672.

The previous prime is 2121213132991. The next prime is 2121213133133. The reversal of 2121213133111 is 1113313121212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121213133111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121213133411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331125916 + ... + 331132321.

It is an arithmetic number, because the mean of its divisors is an integer number (530468848638).

Almost surely, 2^{2121213133111} is an apocalyptic number.

2121213133111 is a deficient number, since it is larger than the sum of its proper divisors (662261441).

2121213133111 is an equidigital number, since it uses as much as digits as its factorization.

2121213133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662261440.

The product of its digits is 216, while the sum is 22.

Adding to 2121213133111 its reverse (1113313121212), we get a palindrome (3234526254323).

The spelling of 2121213133111 in words is "two trillion, one hundred twenty-one billion, two hundred thirteen million, one hundred thirty-three thousand, one hundred eleven".