11212101212121 has 24 divisors (see below), whose sum is σ = 16519970638080. Its totient is φ = 7326247720896.

The previous prime is 11212101212113. The next prime is 11212101212189. The reversal of 11212101212121 is 12121210121211.

It is a happy number.

11212101212121 is a `hidden beast` number, since 1 + 121 + 210 + 1 + 212 + 121 = 666.

It is not a de Polignac number, because 11212101212121 - 2³ = 11212101212113 is a prime.

It is a super-2 number, since 2×11212101212121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11212101212094 and 11212101212103.

It is not an unprimeable number, because it can be changed into a prime (11212101212111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57455445 + ... + 57650258.

It is an arithmetic number, because the mean of its divisors is an integer number (688332109920).

Almost surely, 2^{11212101212121} is an apocalyptic number.

It is an amenable number.

11212101212121 is a deficient number, since it is larger than the sum of its proper divisors (5307869425959).

11212101212121 is a wasteful number, since it uses less digits than its factorization.

11212101212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115105925 (or 115105922 counting only the distinct ones).

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

Adding to 11212101212121 its reverse (12121210121211), we get a palindrome (23333311333332).

The spelling of 11212101212121 in words is "eleven trillion, two hundred twelve billion, one hundred one million, two hundred twelve thousand, one hundred twenty-one".