11313121001221 has 16 divisors (see below), whose sum is σ = 12299725570048. Its totient is φ = 10343413584000.

The previous prime is 11313121001129. The next prime is 11313121001291. The reversal of 11313121001221 is 12210012131311.

It is a cyclic number.

It is not a de Polignac number, because 11313121001221 - 2¹⁵ = 11313120968453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11313121001291) 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, 4708485 + ... + 6692986.

It is an arithmetic number, because the mean of its divisors is an integer number (768732848128).

Almost surely, 2^{11313121001221} is an apocalyptic number.

It is an amenable number.

11313121001221 is a deficient number, since it is larger than the sum of its proper divisors (986604568827).

11313121001221 is a wasteful number, since it uses less digits than its factorization.

11313121001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11402212.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11313121001221 its reverse (12210012131311), we get a palindrome (23523133132532).

The spelling of 11313121001221 in words is "eleven trillion, three hundred thirteen billion, one hundred twenty-one million, one thousand, two hundred twenty-one".