13122201031021 has 4 divisors (see below), whose sum is σ = 13122239515132. Its totient is φ = 13122162546912.

The previous prime is 13122201030973. The next prime is 13122201031057. The reversal of 13122201031021 is 12013010222131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12671001333225 + 451199697796 = 3559635^2 + 671714^2 .

It is a cyclic number.

It is not a de Polignac number, because 13122201031021 - 2¹¹ = 13122201028973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13122201031021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122201031061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18725976 + ... + 19414081.

It is an arithmetic number, because the mean of its divisors is an integer number (3280559878783).

Almost surely, 2^{13122201031021} is an apocalyptic number.

It is an amenable number.

13122201031021 is a deficient number, since it is larger than the sum of its proper divisors (38484111).

13122201031021 is an equidigital number, since it uses as much as digits as its factorization.

13122201031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38484110.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 13122201031021 its reverse (12013010222131), we get a palindrome (25135211253152).

The spelling of 13122201031021 in words is "thirteen trillion, one hundred twenty-two billion, two hundred one million, thirty-one thousand, twenty-one".