10121001101111 has 4 divisors (see below), whose sum is σ = 10121008974432. Its totient is φ = 10120993227792.

The previous prime is 10121001101053. The next prime is 10121001101119. The reversal of 10121001101111 is 11110110012101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10121001101111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121001101092 and 10121001101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121001101119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509695 + ... + 4745648.

It is an arithmetic number, because the mean of its divisors is an integer number (2530252243608).

Almost surely, 2^{10121001101111} is an apocalyptic number.

10121001101111 is a deficient number, since it is larger than the sum of its proper divisors (7873321).

10121001101111 is an equidigital number, since it uses as much as digits as its factorization.

10121001101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7873320.

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

Adding to 10121001101111 its reverse (11110110012101), we get a palindrome (21231111113212).

The spelling of 10121001101111 in words is "ten trillion, one hundred twenty-one billion, one million, one hundred one thousand, one hundred eleven".