11331132001221 has 8 divisors (see below), whose sum is σ = 15110590630464. Its totient is φ = 7552880686400.

The previous prime is 11331132001187. The next prime is 11331132001223. The reversal of 11331132001221 is 12210023113311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11331132001221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331132001223) 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, 301806705 + ... + 301844246.

It is an arithmetic number, because the mean of its divisors is an integer number (1888823828808).

Almost surely, 2^{11331132001221} is an apocalyptic number.

It is an amenable number.

11331132001221 is a deficient number, since it is larger than the sum of its proper divisors (3779458629243).

11331132001221 is an equidigital number, since it uses as much as digits as its factorization.

11331132001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603657211.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 11331132001221 its reverse (12210023113311), we get a palindrome (23541155114532).

The spelling of 11331132001221 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-two million, one thousand, two hundred twenty-one".