11213313121 has 2 divisors, whose sum is σ = 11213313122. Its totient is φ = 11213313120.

The previous prime is 11213313103. The next prime is 11213313193. The reversal of 11213313121 is 12131331211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10472656896 + 740656225 = 102336^2 + 27215^2 .

It is a cyclic number.

It is not a de Polignac number, because 11213313121 - 2⁹ = 11213312609 is a prime.

It is a super-2 number, since 2×11213313121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11213313421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606656560 + 5606656561.

It is an arithmetic number, because the mean of its divisors is an integer number (5606656561).

Almost surely, 2^11213313121 is an apocalyptic number.

It is an amenable number.

11213313121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11213313121 is an equidigital number, since it uses as much as digits as its factorization.

11213313121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

Adding to 11213313121 its reverse (12131331211), we get a palindrome (23344644332).

The spelling of 11213313121 in words is "eleven billion, two hundred thirteen million, three hundred thirteen thousand, one hundred twenty-one".