10121201111 has 4 divisors (see below), whose sum is σ = 11567086992. Its totient is φ = 8675315232.

The previous prime is 10121201099. The next prime is 10121201131. The reversal of 10121201111 is 11110212101.

10121201111 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11110212101 = 971 ⋅11442031.

It is a cyclic number.

It is not a de Polignac number, because 10121201111 - 2⁶ = 10121201047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121201092 and 10121201101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121201131) 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, 722942930 + ... + 722942943.

It is an arithmetic number, because the mean of its divisors is an integer number (2891771748).

Almost surely, 2^10121201111 is an apocalyptic number.

10121201111 is a deficient number, since it is larger than the sum of its proper divisors (1445885881).

10121201111 is an equidigital number, since it uses as much as digits as its factorization.

10121201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445885880.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10121201111 its reverse (11110212101), we get a palindrome (21231413212).

The spelling of 10121201111 in words is "ten billion, one hundred twenty-one million, two hundred one thousand, one hundred eleven".