11012320121 has 16 divisors (see below), whose sum is σ = 12551269248. Its totient is φ = 9564086400.

The previous prime is 11012320091. The next prime is 11012320147. The reversal of 11012320121 is 12102321011.

It is not a de Polignac number, because 11012320121 - 2¹⁴ = 11012303737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11012320096 and 11012320105.

It is not an unprimeable number, because it can be changed into a prime (11012320321) 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, 181205 + ... + 234221.

It is an arithmetic number, because the mean of its divisors is an integer number (784454328).

Almost surely, 2^11012320121 is an apocalyptic number.

11012320121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11012320121 is a deficient number, since it is larger than the sum of its proper divisors (1538949127).

11012320121 is a wasteful number, since it uses less digits than its factorization.

11012320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53872.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11012320121 its reverse (12102321011), we get a palindrome (23114641132).

It can be divided in two parts, 11012 and 320121, that added together give a palindrome (331133).

The spelling of 11012320121 in words is "eleven billion, twelve million, three hundred twenty thousand, one hundred twenty-one".