2121213312111 has 8 divisors (see below), whose sum is σ = 2828448624384. Its totient is φ = 1414060103960.

The previous prime is 2121213312109. The next prime is 2121213312167. The reversal of 2121213312111 is 1112133121212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121213312111 - 2¹ = 2121213312109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121213312191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20465721 + ... + 20569106.

It is an arithmetic number, because the mean of its divisors is an integer number (353556078048).

Almost surely, 2^{2121213312111} is an apocalyptic number.

2121213312111 is a deficient number, since it is larger than the sum of its proper divisors (707235312273).

2121213312111 is a wasteful number, since it uses less digits than its factorization.

2121213312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41052061.

The product of its digits is 144, while the sum is 21.

Adding to 2121213312111 its reverse (1112133121212), we get a palindrome (3233346433323).

The spelling of 2121213312111 in words is "two trillion, one hundred twenty-one billion, two hundred thirteen million, three hundred twelve thousand, one hundred eleven".