13121210221330 has 32 divisors (see below), whose sum is σ = 23883144828336. Its totient is φ = 5189900795904.

The previous prime is 13121210221291. The next prime is 13121210221333. The reversal of 13121210221330 is 3312201212131.

It can be written as a sum of positive squares in 8 ways, for example, as 7131693093529 + 5989517127801 = 2670523^2 + 2447349^2 .

It is not an unprimeable number, because it can be changed into a prime (13121210221333) 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 15 ways as a sum of consecutive naturals, for example, 18281229 + ... + 18985408.

Almost surely, 2^{13121210221330} is an apocalyptic number.

13121210221330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13121210221330 is a deficient number, since it is larger than the sum of its proper divisors (10761934607006).

13121210221330 is a wasteful number, since it uses less digits than its factorization.

13121210221330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37267038.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 13121210221330 its reverse (3312201212131), we get a palindrome (16433411433461).

The spelling of 13121210221330 in words is "thirteen trillion, one hundred twenty-one billion, two hundred ten million, two hundred twenty-one thousand, three hundred thirty".