11211243331 has 4 divisors (see below), whose sum is σ = 11221732000. Its totient is φ = 11200754664.

The previous prime is 11211243293. The next prime is 11211243347. The reversal of 11211243331 is 13334211211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13334211211 = 19801 ⋅673411.

It is a cyclic number.

It is not a de Polignac number, because 11211243331 - 2⁷ = 11211243203 is a prime.

It is a super-2 number, since 2×11211243331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211240331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5242731 + ... + 5244868.

It is an arithmetic number, because the mean of its divisors is an integer number (2805433000).

Almost surely, 2^11211243331 is an apocalyptic number.

11211243331 is a deficient number, since it is larger than the sum of its proper divisors (10488669).

11211243331 is a wasteful number, since it uses less digits than its factorization.

11211243331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10488668.

The product of its digits is 432, while the sum is 22.

Adding to 11211243331 its reverse (13334211211), we get a palindrome (24545454542).

The spelling of 11211243331 in words is "eleven billion, two hundred eleven million, two hundred forty-three thousand, three hundred thirty-one".