2121201133111 has 16 divisors (see below), whose sum is σ = 2198047887360. Its totient is φ = 2044604026080.

The previous prime is 2121201133069. The next prime is 2121201133171. The reversal of 2121201133111 is 1113311021212.

It is a cyclic number.

It is not a de Polignac number, because 2121201133111 - 2²¹ = 2121199035959 is a prime.

It is a super-2 number, since 2×2121201133111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201133171) 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 15 ways as a sum of consecutive naturals, for example, 43745266 + ... + 43793728.

It is an arithmetic number, because the mean of its divisors is an integer number (137377992960).

Almost surely, 2^{2121201133111} is an apocalyptic number.

2121201133111 is a deficient number, since it is larger than the sum of its proper divisors (76846754249).

2121201133111 is a wasteful number, since it uses less digits than its factorization.

2121201133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51006.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 2121201133111 its reverse (1113311021212), we get a palindrome (3234512154323).

The spelling of 2121201133111 in words is "two trillion, one hundred twenty-one billion, two hundred one million, one hundred thirty-three thousand, one hundred eleven".