11212001121 has 16 divisors (see below), whose sum is σ = 15004496000. Its totient is φ = 7447120128.

The previous prime is 11212001089. The next prime is 11212001189. The reversal of 11212001121 is 12110021211.

It is not a de Polignac number, because 11212001121 - 2⁵ = 11212001089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212001097 and 11212001106.

It is not an unprimeable number, because it can be changed into a prime (11212008121) 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, 1805580 + ... + 1811778.

It is an arithmetic number, because the mean of its divisors is an integer number (937781000).

Almost surely, 2^11212001121 is an apocalyptic number.

It is an amenable number.

11212001121 is a deficient number, since it is larger than the sum of its proper divisors (3792494879).

11212001121 is a wasteful number, since it uses less digits than its factorization.

11212001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11212001121 its reverse (12110021211), we get a palindrome (23322022332).

The spelling of 11212001121 in words is "eleven billion, two hundred twelve million, one thousand, one hundred twenty-one".