11331021202121 has 8 divisors (see below), whose sum is σ = 11333465325000. Its totient is φ = 11328577303680.

The previous prime is 11331021202117. The next prime is 11331021202211. The reversal of 11331021202121 is 12120212013311.

It can be written as a sum of positive squares in 4 ways, for example, as 22630990096 + 11308390212025 = 150436^2 + 3362795^2 .

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 11331021202121 - 2² = 11331021202117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11331021202093 and 11331021202102.

It is not an unprimeable number, because it can be changed into a prime (11331021208121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133186805 + ... + 133271853.

It is an arithmetic number, because the mean of its divisors is an integer number (1416683165625).

Almost surely, 2^{11331021202121} is an apocalyptic number.

It is an amenable number.

11331021202121 is a deficient number, since it is larger than the sum of its proper divisors (2444122879).

11331021202121 is an equidigital number, since it uses as much as digits as its factorization.

11331021202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112219.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11331021202121 its reverse (12120212013311), we get a palindrome (23451233215432).

The spelling of 11331021202121 in words is "eleven trillion, three hundred thirty-one billion, twenty-one million, two hundred two thousand, one hundred twenty-one".