11011220121201 has 16 divisors (see below), whose sum is σ = 15158159167488. Its totient is φ = 7102638853200.

The previous prime is 11011220121197. The next prime is 11011220121241. The reversal of 11011220121201 is 10212102211011.

It is a happy number.

It is not a de Polignac number, because 11011220121201 - 2² = 11011220121197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11011220121241) 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, 10967581 + ... + 11929386.

It is an arithmetic number, because the mean of its divisors is an integer number (947384947968).

Almost surely, 2^{11011220121201} is an apocalyptic number.

It is an amenable number.

11011220121201 is a deficient number, since it is larger than the sum of its proper divisors (4146939046287).

11011220121201 is a wasteful number, since it uses less digits than its factorization.

11011220121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22902172.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11011220121201 its reverse (10212102211011), we get a palindrome (21223322332212).

The spelling of 11011220121201 in words is "eleven trillion, eleven billion, two hundred twenty million, one hundred twenty-one thousand, two hundred one".