11211121121201 has 16 divisors (see below), whose sum is σ = 11808253872000. Its totient is φ = 10614697043328.

The previous prime is 11211121121173. The next prime is 11211121121231. The reversal of 11211121121201 is 10212112111211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211121121201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211121121201.

It is not an unprimeable number, because it can be changed into a prime (11211121121231) 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, 576901781 + ... + 576921213.

It is an arithmetic number, because the mean of its divisors is an integer number (738015867000).

Almost surely, 2^{11211121121201} is an apocalyptic number.

It is an amenable number.

11211121121201 is a deficient number, since it is larger than the sum of its proper divisors (597132750799).

11211121121201 is a wasteful number, since it uses less digits than its factorization.

11211121121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36088.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11211121121201 its reverse (10212112111211), we get a palindrome (21423233232412).

The spelling of 11211121121201 in words is "eleven trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred one".