11121000121 has 16 divisors (see below), whose sum is σ = 13870568448. Its totient is φ = 8662323600.

The previous prime is 11121000113. The next prime is 11121000133. The reversal of 11121000121 is 12100012111.

It is not a de Polignac number, because 11121000121 - 2³ = 11121000113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121000098 and 11121000107.

It is not an unprimeable number, because it can be changed into a prime (11121090121) 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, 179676 + ... + 233506.

It is an arithmetic number, because the mean of its divisors is an integer number (866910528).

Almost surely, 2^11121000121 is an apocalyptic number.

11121000121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11121000121 is a deficient number, since it is larger than the sum of its proper divisors (2749568327).

11121000121 is a wasteful number, since it uses less digits than its factorization.

11121000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56532.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11121000121 its reverse (12100012111), we get a palindrome (23221012232).

It can be divided in two parts, 11 and 121000121, that multiplied together give a palindrome (1331001331).

The spelling of 11121000121 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-one", and thus it is an aban number.