10112121211 has 4 divisors (see below), whose sum is σ = 10113095952. Its totient is φ = 10111146472.

The previous prime is 10112121209. The next prime is 10112121241. The reversal of 10112121211 is 11212121101.

It is a happy number.

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 10112121211 - 2¹ = 10112121209 is a prime.

It is a super-2 number, since 2×10112121211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10112121191 and 10112121200.

It is not an unprimeable number, because it can be changed into a prime (10112121241) 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, 471640 + ... + 492613.

It is an arithmetic number, because the mean of its divisors is an integer number (2528273988).

Almost surely, 2^10112121211 is an apocalyptic number.

10112121211 is a deficient number, since it is larger than the sum of its proper divisors (974741).

10112121211 is an equidigital number, since it uses as much as digits as its factorization.

10112121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974740.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10112121211 its reverse (11212121101), we get a palindrome (21324242312).

The spelling of 10112121211 in words is "ten billion, one hundred twelve million, one hundred twenty-one thousand, two hundred eleven".