10212120011111 has 2 divisors, whose sum is σ = 10212120011112. Its totient is φ = 10212120011110.

The previous prime is 10212120011047. The next prime is 10212120011189. The reversal of 10212120011111 is 11111002121201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10212120011111 - 2⁶ = 10212120011047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10212120011011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106060005555 + 5106060005556.

It is an arithmetic number, because the mean of its divisors is an integer number (5106060005556).

Almost surely, 2^{10212120011111} is an apocalyptic number.

10212120011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212120011111 is an equidigital number, since it uses as much as digits as its factorization.

10212120011111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 10212120011111 its reverse (11111002121201), we get a palindrome (21323122132312).

The spelling of 10212120011111 in words is "ten trillion, two hundred twelve billion, one hundred twenty million, eleven thousand, one hundred eleven".