11313212111221 has 8 divisors (see below), whose sum is σ = 11590826877504. Its totient is φ = 11038882727040.

The previous prime is 11313212111191. The next prime is 11313212111251. The reversal of 11313212111221 is 12211121231311.

It is an interprime number because it is at equal distance from previous prime (11313212111191) and next prime (11313212111251).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11313212111221 - 2³³ = 11304622176629 is a prime.

It is a super-2 number, since 2×11313212111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11313212111192 and 11313212111201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11313212111251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821338555 + ... + 821352328.

It is an arithmetic number, because the mean of its divisors is an integer number (1448853359688).

Almost surely, 2^{11313212111221} is an apocalyptic number.

It is an amenable number.

11313212111221 is a deficient number, since it is larger than the sum of its proper divisors (277614766283).

11313212111221 is an equidigital number, since it uses as much as digits as its factorization.

11313212111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642691051.

The product of its digits is 144, while the sum is 22.

Adding to 11313212111221 its reverse (12211121231311), we get a palindrome (23524333342532).

The spelling of 11313212111221 in words is "eleven trillion, three hundred thirteen billion, two hundred twelve million, one hundred eleven thousand, two hundred twenty-one".