121110212011 has 4 divisors (see below), whose sum is σ = 122471001000. Its totient is φ = 119749423024.

The previous prime is 121110211991. The next prime is 121110212063. The reversal of 121110212011 is 110212011121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110212011121 = 73 ⋅1509753577.

It is a cyclic number.

It is not a de Polignac number, because 121110212011 - 2⁵ = 121110211979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110211982 and 121110212000.

It is not an unprimeable number, because it can be changed into a prime (121110212411) 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, 680394361 + ... + 680394538.

It is an arithmetic number, because the mean of its divisors is an integer number (30617750250).

Almost surely, 2^121110212011 is an apocalyptic number.

121110212011 is a deficient number, since it is larger than the sum of its proper divisors (1360788989).

121110212011 is an equidigital number, since it uses as much as digits as its factorization.

121110212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360788988.

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

Adding to 121110212011 its reverse (110212011121), we get a palindrome (231322223132).

It can be divided in two parts, 121 and 110212011, that multiplied together give a palindrome (13335653331).

The spelling of 121110212011 in words is "one hundred twenty-one billion, one hundred ten million, two hundred twelve thousand, eleven".