11321211123 has 24 divisors (see below), whose sum is σ = 17678778000. Its totient is φ = 6956985024.

The previous prime is 11321211107. The next prime is 11321211127. The reversal of 11321211123 is 32111212311.

11321211123 is a `hidden beast` number, since 11 + 321 + 211 + 123 = 666.

It is not a de Polignac number, because 11321211123 - 2⁴ = 11321211107 is a prime.

It is a super-2 number, since 2×11321211123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11321211096 and 11321211105.

It is not an unprimeable number, because it can be changed into a prime (11321211127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 888348 + ... + 901001.

It is an arithmetic number, because the mean of its divisors is an integer number (736615750).

Almost surely, 2^11321211123 is an apocalyptic number.

11321211123 is a deficient number, since it is larger than the sum of its proper divisors (6357566877).

11321211123 is a wasteful number, since it uses less digits than its factorization.

11321211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789411 (or 1789408 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 11321211123 its reverse (32111212311), we get a palindrome (43432423434).

The spelling of 11321211123 in words is "eleven billion, three hundred twenty-one million, two hundred eleven thousand, one hundred twenty-three".