2121111163111 has 2 divisors, whose sum is σ = 2121111163112. Its totient is φ = 2121111163110.

The previous prime is 2121111163049. The next prime is 2121111163183. The reversal of 2121111163111 is 1113611111212.

It is a m-pointer prime, because the next prime (2121111163183) can be obtained adding 2121111163111 to its product of digits (72).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121111163111 - 2¹¹ = 2121111161063 is a prime.

It is a super-2 number, since 2×2121111163111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121111163811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060555581555 + 1060555581556.

It is an arithmetic number, because the mean of its divisors is an integer number (1060555581556).

Almost surely, 2^{2121111163111} is an apocalyptic number.

2121111163111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121111163111 is an equidigital number, since it uses as much as digits as its factorization.

2121111163111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 22.

Adding to 2121111163111 its reverse (1113611111212), we get a palindrome (3234722274323).

The spelling of 2121111163111 in words is "two trillion, one hundred twenty-one billion, one hundred eleven million, one hundred sixty-three thousand, one hundred eleven".