2121000110111 has 2 divisors, whose sum is σ = 2121000110112. Its totient is φ = 2121000110110.

The previous prime is 2121000110083. The next prime is 2121000110153. The reversal of 2121000110111 is 1110110001212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121000110111 - 2¹⁴ = 2121000093727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121000110092 and 2121000110101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121000610111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060500055055 + 1060500055056.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500055056).

Almost surely, 2^{2121000110111} is an apocalyptic number.

2121000110111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121000110111 is an equidigital number, since it uses as much as digits as its factorization.

2121000110111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 2121000110111 its reverse (1110110001212), we get a palindrome (3231110111323).

The spelling of 2121000110111 in words is "two trillion, one hundred twenty-one billion, one hundred ten thousand, one hundred eleven".