11505121201 has 8 divisors (see below), whose sum is σ = 13151487104. Its totient is φ = 9859449600.

The previous prime is 11505121163. The next prime is 11505121213. The reversal of 11505121201 is 10212150511.

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

It is not a de Polignac number, because 11505121201 - 2⁷ = 11505121073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11505121241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137565 + ... + 204778.

It is an arithmetic number, because the mean of its divisors is an integer number (1643935888).

Almost surely, 2^11505121201 is an apocalyptic number.

It is an amenable number.

11505121201 is a deficient number, since it is larger than the sum of its proper divisors (1646365903).

11505121201 is an equidigital number, since it uses as much as digits as its factorization.

11505121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347151.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 11505121201 its reverse (10212150511), we get a palindrome (21717271712).

The spelling of 11505121201 in words is "eleven billion, five hundred five million, one hundred twenty-one thousand, two hundred one".