10121011111 has 2 divisors, whose sum is σ = 10121011112. Its totient is φ = 10121011110.

The previous prime is 10121011091. The next prime is 10121011157. The reversal of 10121011111 is 11111012101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10121011111 - 2⁵ = 10121011079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121041111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060505555 + 5060505556.

It is an arithmetic number, because the mean of its divisors is an integer number (5060505556).

Almost surely, 2^10121011111 is an apocalyptic number.

10121011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121011111 is an equidigital number, since it uses as much as digits as its factorization.

10121011111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 10121011111 its reverse (11111012101), we get a palindrome (21232023212).

It can be divided in two parts, 1012101 and 1111, that multiplied together give a palindrome (1124444211).

The spelling of 10121011111 in words is "ten billion, one hundred twenty-one million, eleven thousand, one hundred eleven".