11211213122001 has 12 divisors (see below), whose sum is σ = 16246045171200. Its totient is φ = 7450109468280.

The previous prime is 11211213121993. The next prime is 11211213122099. The reversal of 11211213122001 is 10022131211211.

It is a happy number.

11211213122001 is a `hidden beast` number, since 11 + 21 + 121 + 312 + 200 + 1 = 666.

It is not a de Polignac number, because 11211213122001 - 2³ = 11211213121993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11211213122201) 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, 2002714801 + ... + 2002720398.

It is an arithmetic number, because the mean of its divisors is an integer number (1353837097600).

Almost surely, 2^{11211213122001} is an apocalyptic number.

It is an amenable number.

11211213122001 is a deficient number, since it is larger than the sum of its proper divisors (5034832049199).

11211213122001 is a wasteful number, since it uses less digits than its factorization.

11211213122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005435516 (or 4005435513 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 11211213122001 its reverse (10022131211211), we get a palindrome (21233344333212).

The spelling of 11211213122001 in words is "eleven trillion, two hundred eleven billion, two hundred thirteen million, one hundred twenty-two thousand, one".