11121122121201 has 12 divisors (see below), whose sum is σ = 16257383342928. Its totient is φ = 7324755131544.

The previous prime is 11121122121133. The next prime is 11121122121337. The reversal of 11121122121201 is 10212122112111.

It is a happy number.

11121122121201 is a `hidden beast` number, since 1 + 11 + 211 + 221 + 21 + 201 = 666.

It is not a de Polignac number, because 11121122121201 - 2¹⁷ = 11121121990129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11121122121601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7443856095 + ... + 7443857588.

It is an arithmetic number, because the mean of its divisors is an integer number (1354781945244).

Almost surely, 2^{11121122121201} is an apocalyptic number.

It is an amenable number.

11121122121201 is a deficient number, since it is larger than the sum of its proper divisors (5136261221727).

11121122121201 is a wasteful number, since it uses less digits than its factorization.

11121122121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14887713772 (or 14887713769 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11121122121201 its reverse (10212122112111), we get a palindrome (21333244233312).

The spelling of 11121122121201 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred one".