11400121 has 4 divisors (see below), whose sum is σ = 11431552. Its totient is φ = 11368692.

The previous prime is 11400097. The next prime is 11400131. The reversal of 11400121 is 12100411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11400121 - 2¹⁹ = 10875833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11400098 and 11400107.

It is not an unprimeable number, because it can be changed into a prime (11400131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15165 + ... + 15898.

It is an arithmetic number, because the mean of its divisors is an integer number (2857888).

Almost surely, 2^11400121 is an apocalyptic number.

It is an amenable number.

11400121 is a deficient number, since it is larger than the sum of its proper divisors (31431).

11400121 is an equidigital number, since it uses as much as digits as its factorization.

11400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31430.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 11400121 is about 3376.4065217328. The cubic root of 11400121 is about 225.0625077359.

Adding to 11400121 its reverse (12100411), we get a palindrome (23500532).

The spelling of 11400121 in words is "eleven million, four hundred thousand, one hundred twenty-one".