11212111121211 has 144 divisors (see below), whose sum is σ = 22348303181568. Its totient is φ = 5231122041600.

The previous prime is 11212111121191. The next prime is 11212111121213.

11212111121211 is a `hidden beast` number, since 1 + 121 + 211 + 1 + 121 + 211 = 666.

11212111121211 is nontrivially palindromic in base 10.

11212111121211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11212111121211 - 2¹⁴ = 11212111104827 is a prime.

It is a super-2 number, since 2×11212111121211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11212111121213) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 11878776 + ... + 12787866.

It is an arithmetic number, because the mean of its divisors is an integer number (155196549872).

Almost surely, 2^{11212111121211} is an apocalyptic number.

11212111121211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11212111121211 is a deficient number, since it is larger than the sum of its proper divisors (11136192060357).

11212111121211 is a wasteful number, since it uses less digits than its factorization.

11212111121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909202 (or 909162 counting only the distinct ones).

The product of its digits is 16, while the sum is 18.

It can be divided in two parts, 1121211 and 1121211, that added together give a palindrome (2242422).

The spelling of 11212111121211 in words is "eleven trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".