11112112021121 has 8 divisors (see below), whose sum is σ = 11348588843904. Its totient is φ = 10875637236240.

The previous prime is 11112112021111. The next prime is 11112112021163. The reversal of 11112112021121 is 12112021121111.

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 11112112021121 - 2³⁸ = 10837234114177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112112021121.

It is not an unprimeable number, because it can be changed into a prime (11112112021111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16468046 + ... + 17129528.

It is an arithmetic number, because the mean of its divisors is an integer number (1418573605488).

Almost surely, 2^{11112112021121} is an apocalyptic number.

It is an amenable number.

11112112021121 is a deficient number, since it is larger than the sum of its proper divisors (236476822783).

11112112021121 is an equidigital number, since it uses as much as digits as its factorization.

11112112021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018951.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11112112021121 its reverse (12112021121111), we get a palindrome (23224133142232).

It can be divided in two parts, 111 and 12112021121, that multiplied together give a palindrome (1344434344431).

The spelling of 11112112021121 in words is "eleven trillion, one hundred twelve billion, one hundred twelve million, twenty-one thousand, one hundred twenty-one".