11001211121 has 8 divisors (see below), whose sum is σ = 11487536640. Its totient is φ = 10515553312.

The previous prime is 11001211097. The next prime is 11001211157. The reversal of 11001211121 is 12111210011.

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 11001211121 - 2¹⁸ = 11000948977 is a prime.

It is a super-2 number, since 2×11001211121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001211171) 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, 133100 + ... + 199293.

It is an arithmetic number, because the mean of its divisors is an integer number (1435942080).

Almost surely, 2^11001211121 is an apocalyptic number.

It is an amenable number.

11001211121 is a deficient number, since it is larger than the sum of its proper divisors (486325519).

11001211121 is a wasteful number, since it uses less digits than its factorization.

11001211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333855.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11001211121 its reverse (12111210011), we get a palindrome (23112421132).

The spelling of 11001211121 in words is "eleven billion, one million, two hundred eleven thousand, one hundred twenty-one".