2121333011111 has 16 divisors (see below), whose sum is σ = 2159379045600. Its totient is φ = 2083480109568.

The previous prime is 2121333011089. The next prime is 2121333011113. The reversal of 2121333011111 is 1111103331212.

It is a cyclic number.

It is not a de Polignac number, because 2121333011111 - 2²² = 2121328816807 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 (2121333011113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55581611 + ... + 55619763.

It is an arithmetic number, because the mean of its divisors is an integer number (134961190350).

Almost surely, 2^{2121333011111} is an apocalyptic number.

2121333011111 is a deficient number, since it is larger than the sum of its proper divisors (38046034489).

2121333011111 is a wasteful number, since it uses less digits than its factorization.

2121333011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40658.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 2121333011111 its reverse (1111103331212), we get a palindrome (3232436342323).

The spelling of 2121333011111 in words is "two trillion, one hundred twenty-one billion, three hundred thirty-three million, eleven thousand, one hundred eleven".