11212222021121 has 16 divisors (see below), whose sum is σ = 12492148451328. Its totient is φ = 9975748002000.

The previous prime is 11212222021069. The next prime is 11212222021171. The reversal of 11212222021121 is 12112022221211.

It is not a de Polignac number, because 11212222021121 - 2⁴² = 6814175510017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212222021093 and 11212222021102.

It is not an unprimeable number, because it can be changed into a prime (11212222021171) 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 15 ways as a sum of consecutive naturals, for example, 17180636 + ... + 17821298.

It is an arithmetic number, because the mean of its divisors is an integer number (780759278208).

Almost surely, 2^{11212222021121} is an apocalyptic number.

11212222021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11212222021121 is a deficient number, since it is larger than the sum of its proper divisors (1279926430207).

11212222021121 is a wasteful number, since it uses less digits than its factorization.

11212222021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674572.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11212222021121 its reverse (12112022221211), we get a palindrome (23324244242332).

The spelling of 11212222021121 in words is "eleven trillion, two hundred twelve billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-one".