11331131221123 has 16 divisors (see below), whose sum is σ = 13267164278016. Its totient is φ = 9474973411680.

The previous prime is 11331131221099. The next prime is 11331131221139. The reversal of 11331131221123 is 32112213113311.

It is not a de Polignac number, because 11331131221123 - 2²¹ = 11331129123971 is a prime.

It is a super-2 number, since 2×11331131221123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11331131221523) 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, 22679161 + ... + 23173402.

It is an arithmetic number, because the mean of its divisors is an integer number (829197767376).

Almost surely, 2^{11331131221123} is an apocalyptic number.

11331131221123 is a deficient number, since it is larger than the sum of its proper divisors (1936033056893).

11331131221123 is an equidigital number, since it uses as much as digits as its factorization.

11331131221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45853434.

The product of its digits is 648, while the sum is 25.

Adding to 11331131221123 its reverse (32112213113311), we get a palindrome (43443344334434).

The spelling of 11331131221123 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-three".