11444312121 has 32 divisors (see below), whose sum is σ = 17265626496. Its totient is φ = 6681600000.

The previous prime is 11444312111. The next prime is 11444312167. The reversal of 11444312121 is 12121344411.

It is a happy number.

It is not a de Polignac number, because 11444312121 - 2⁶ = 11444312057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11444312091 and 11444312100.

It is not an unprimeable number, because it can be changed into a prime (11444312111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76921 + ... + 169721.

It is an arithmetic number, because the mean of its divisors is an integer number (539550828).

Almost surely, 2^11444312121 is an apocalyptic number.

11444312121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11444312121 is a deficient number, since it is larger than the sum of its proper divisors (5821314375).

11444312121 is a wasteful number, since it uses less digits than its factorization.

11444312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92953.

The product of its digits is 768, while the sum is 24.

Adding to 11444312121 its reverse (12121344411), we get a palindrome (23565656532).

The spelling of 11444312121 in words is "eleven billion, four hundred forty-four million, three hundred twelve thousand, one hundred twenty-one".