11540211113221 has 16 divisors (see below), whose sum is σ = 13647468522240. Its totient is φ = 9547811118720.

The previous prime is 11540211113209. The next prime is 11540211113227. The reversal of 11540211113221 is 12231111204511.

It is not a de Polignac number, because 11540211113221 - 2¹³ = 11540211105029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11540211113227) 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, 7343040 + ... + 8775001.

It is an arithmetic number, because the mean of its divisors is an integer number (852966782640).

Almost surely, 2^{11540211113221} is an apocalyptic number.

It is an amenable number.

11540211113221 is a deficient number, since it is larger than the sum of its proper divisors (2107257409019).

11540211113221 is a wasteful number, since it uses less digits than its factorization.

11540211113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16121604.

The product of its (nonzero) digits is 480, while the sum is 25.

Adding to 11540211113221 its reverse (12231111204511), we get a palindrome (23771322317732).

The spelling of 11540211113221 in words is "eleven trillion, five hundred forty billion, two hundred eleven million, one hundred thirteen thousand, two hundred twenty-one".