10121111000111 has 2 divisors, whose sum is σ = 10121111000112. Its totient is φ = 10121111000110.

The previous prime is 10121111000107. The next prime is 10121111000123. The reversal of 10121111000111 is 11100011112101.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10121111000111 - 2² = 10121111000107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10121111000092 and 10121111000101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121111000411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060555500055 + 5060555500056.

It is an arithmetic number, because the mean of its divisors is an integer number (5060555500056).

Almost surely, 2^{10121111000111} is an apocalyptic number.

10121111000111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121111000111 is an equidigital number, since it uses as much as digits as its factorization.

10121111000111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 10121111000111 its reverse (11100011112101), we get a palindrome (21221122112212).

The spelling of 10121111000111 in words is "ten trillion, one hundred twenty-one billion, one hundred eleven million, one hundred eleven", and thus it is an aban number.