10120211111 has 4 divisors (see below), whose sum is σ = 10172647632. Its totient is φ = 10067774592.

The previous prime is 10120211089. The next prime is 10120211149. The reversal of 10120211111 is 11111202101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11111202101 = 78809 ⋅140989.

It is a cyclic number.

It is not a de Polignac number, because 10120211111 - 2⁶ = 10120211047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120211092 and 10120211101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120211411) 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, 26217971 + ... + 26218356.

It is an arithmetic number, because the mean of its divisors is an integer number (2543161908).

Almost surely, 2^10120211111 is an apocalyptic number.

10120211111 is a deficient number, since it is larger than the sum of its proper divisors (52436521).

10120211111 is an equidigital number, since it uses as much as digits as its factorization.

10120211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52436520.

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

Adding to 10120211111 its reverse (11111202101), we get a palindrome (21231413212).

The spelling of 10120211111 in words is "ten billion, one hundred twenty million, two hundred eleven thousand, one hundred eleven".