11212011121 has 8 divisors (see below), whose sum is σ = 11401673024. Its totient is φ = 11022538320.

The previous prime is 11212011119. The next prime is 11212011127. The reversal of 11212011121 is 12111021211.

It is a happy number.

11212011121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11212011121 - 2¹ = 11212011119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212011127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74956 + ... + 167458.

It is an arithmetic number, because the mean of its divisors is an integer number (1425209128).

Almost surely, 2^11212011121 is an apocalyptic number.

It is an amenable number.

11212011121 is a deficient number, since it is larger than the sum of its proper divisors (189661903).

11212011121 is an equidigital number, since it uses as much as digits as its factorization.

11212011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94551.

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

Adding to 11212011121 its reverse (12111021211), we get a palindrome (23323032332).

The spelling of 11212011121 in words is "eleven billion, two hundred twelve million, eleven thousand, one hundred twenty-one".