11231021221123 has 8 divisors (see below), whose sum is σ = 12647249703936. Its totient is φ = 9880663830600.

The previous prime is 11231021221103. The next prime is 11231021221129. The reversal of 11231021221123 is 32112212013211.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11231021221123 is a prime.

It is a super-2 number, since 2×11231021221123² (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 = 11231021221094 and 11231021221103.

It is not an unprimeable number, because it can be changed into a prime (11231021221129) 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, 16467772711 + ... + 16467773392.

It is an arithmetic number, because the mean of its divisors is an integer number (1580906212992).

Almost surely, 2^{11231021221123} is an apocalyptic number.

11231021221123 is a deficient number, since it is larger than the sum of its proper divisors (1416228482813).

11231021221123 is a wasteful number, since it uses less digits than its factorization.

11231021221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32935546145.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 11231021221123 its reverse (32112212013211), we get a palindrome (43343233234334).

The spelling of 11231021221123 in words is "eleven trillion, two hundred thirty-one billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-three".