11312121023 has 8 divisors (see below), whose sum is σ = 12928804992. Its totient is φ = 9695603736.

The previous prime is 11312121017. The next prime is 11312121047. The reversal of 11312121023 is 32012121311.

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

It is a de Polignac number, because none of the positive numbers 2^k-11312121023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11312120992 and 11312121010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312121083) 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, 188636 + ... + 241262.

It is an arithmetic number, because the mean of its divisors is an integer number (1616100624).

Almost surely, 2^11312121023 is an apocalyptic number.

11312121023 is a deficient number, since it is larger than the sum of its proper divisors (1616683969).

11312121023 is an equidigital number, since it uses as much as digits as its factorization.

11312121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83341.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11312121023 its reverse (32012121311), we get a palindrome (43324242334).

The spelling of 11312121023 in words is "eleven billion, three hundred twelve million, one hundred twenty-one thousand, twenty-three".