11211221001121 has 8 divisors (see below), whose sum is σ = 11236114213344. Its totient is φ = 11186340984000.

The previous prime is 11211221001103. The next prime is 11211221001173. The reversal of 11211221001121 is 12110012211211.

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 11211221001121 - 2²⁵ = 11211187446689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211221001095 and 11211221001104.

It is not an unprimeable number, because it can be changed into a prime (11211221061121) 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, 1596616 + ... + 4997161.

It is an arithmetic number, because the mean of its divisors is an integer number (1404514276668).

Almost surely, 2^{11211221001121} is an apocalyptic number.

It is an amenable number.

11211221001121 is a deficient number, since it is larger than the sum of its proper divisors (24893212223).

11211221001121 is an equidigital number, since it uses as much as digits as its factorization.

11211221001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597551.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11211221001121 its reverse (12110012211211), we get a palindrome (23321233212332).

The spelling of 11211221001121 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, one thousand, one hundred twenty-one".