13021121244244 has 48 divisors (see below), whose sum is σ = 23960317222800. Its totient is φ = 6182709120000.

The previous prime is 13021121244139. The next prime is 13021121244259. The reversal of 13021121244244 is 44244212112031.

It can be written as a sum of positive squares in 8 ways, for example, as 311183234244 + 12709938010000 = 557838^2 + 3565100^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230429994 + ... + 230486494.

It is an arithmetic number, because the mean of its divisors is an integer number (499173275475).

Almost surely, 2^{13021121244244} is an apocalyptic number.

It is an amenable number.

13021121244244 is a deficient number, since it is larger than the sum of its proper divisors (10939195978556).

13021121244244 is a wasteful number, since it uses less digits than its factorization.

13021121244244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89164 (or 89162 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 13021121244244 its reverse (44244212112031), we get a palindrome (57265333356275).

The spelling of 13021121244244 in words is "thirteen trillion, twenty-one billion, one hundred twenty-one million, two hundred forty-four thousand, two hundred forty-four".