11403521121 has 8 divisors (see below), whose sum is σ = 15462401760. Its totient is φ = 7473493952.

The previous prime is 11403521117. The next prime is 11403521131. The reversal of 11403521121 is 12112530411.

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

It is a cyclic number.

It is not a de Polignac number, because 11403521121 - 2² = 11403521117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11403521131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32213160 + ... + 32213513.

It is an arithmetic number, because the mean of its divisors is an integer number (1932800220).

Almost surely, 2^11403521121 is an apocalyptic number.

It is an amenable number.

11403521121 is a deficient number, since it is larger than the sum of its proper divisors (4058880639).

11403521121 is an equidigital number, since it uses as much as digits as its factorization.

11403521121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64426735.

The product of its (nonzero) digits is 240, while the sum is 21.

The spelling of 11403521121 in words is "eleven billion, four hundred three million, five hundred twenty-one thousand, one hundred twenty-one".