10121021201111 has 4 divisors (see below), whose sum is σ = 10126999360632. Its totient is φ = 10115043041592.

The previous prime is 10121021201107. The next prime is 10121021201119. The reversal of 10121021201111 is 11110212012101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10121021201111 - 2² = 10121021201107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121021201119) 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, 2989077221 + ... + 2989080606.

It is an arithmetic number, because the mean of its divisors is an integer number (2531749840158).

Almost surely, 2^{10121021201111} is an apocalyptic number.

10121021201111 is a deficient number, since it is larger than the sum of its proper divisors (5978159521).

10121021201111 is an equidigital number, since it uses as much as digits as its factorization.

10121021201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978159520.

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

Adding to 10121021201111 its reverse (11110212012101), we get a palindrome (21231233213212).

The spelling of 10121021201111 in words is "ten trillion, one hundred twenty-one billion, twenty-one million, two hundred one thousand, one hundred eleven".