10122011111 has 2 divisors, whose sum is σ = 10122011112. Its totient is φ = 10122011110.

The previous prime is 10122011093. The next prime is 10122011183. The reversal of 10122011111 is 11111022101.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10122011111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10122011092 and 10122011101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10122010111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5061005555 + 5061005556.

It is an arithmetic number, because the mean of its divisors is an integer number (5061005556).

Almost surely, 2^10122011111 is an apocalyptic number.

10122011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10122011111 is an equidigital number, since it uses as much as digits as its factorization.

10122011111 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 10122011111 its reverse (11111022101), we get a palindrome (21233033212).

The spelling of 10122011111 in words is "ten billion, one hundred twenty-two million, eleven thousand, one hundred eleven".