11112202121121 has 16 divisors (see below), whose sum is σ = 16463026118400. Its totient is φ = 7407907741584.

The previous prime is 11112202121113. The next prime is 11112202121129. The reversal of 11112202121121 is 12112120221111.

It is a happy number.

11112202121121 is a `hidden beast` number, since 1 + 111 + 220 + 212 + 1 + 121 = 666.

It is an interprime number because it is at equal distance from previous prime (11112202121113) and next prime (11112202121129).

It is not a de Polignac number, because 11112202121121 - 2³ = 11112202121113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11112202121094 and 11112202121103.

It is not an unprimeable number, because it can be changed into a prime (11112202121129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5405946 + ... + 7172771.

It is an arithmetic number, because the mean of its divisors is an integer number (1028939132400).

Almost surely, 2^{11112202121121} is an apocalyptic number.

It is an amenable number.

11112202121121 is a deficient number, since it is larger than the sum of its proper divisors (5350823997279).

11112202121121 is a wasteful number, since it uses less digits than its factorization.

11112202121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12611445 (or 12611439 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11112202121121 its reverse (12112120221111), we get a palindrome (23224322342232).

The spelling of 11112202121121 in words is "eleven trillion, one hundred twelve billion, two hundred two million, one hundred twenty-one thousand, one hundred twenty-one".