11121212001211 has 4 divisors (see below), whose sum is σ = 11976689847472. Its totient is φ = 10265734154952.

The previous prime is 11121212001149. The next prime is 11121212001257. The reversal of 11121212001211 is 11210021212111.

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 11121212001211 - 2⁹ = 11121212000699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121212011211) 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, 427738923111 + ... + 427738923136.

It is an arithmetic number, because the mean of its divisors is an integer number (2994172461868).

Almost surely, 2^{11121212001211} is an apocalyptic number.

11121212001211 is a deficient number, since it is larger than the sum of its proper divisors (855477846261).

11121212001211 is an equidigital number, since it uses as much as digits as its factorization.

11121212001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855477846260.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11121212001211 its reverse (11210021212111), we get a palindrome (22331233213322).

The spelling of 11121212001211 in words is "eleven trillion, one hundred twenty-one billion, two hundred twelve million, one thousand, two hundred eleven".