13020435571061 has 2 divisors, whose sum is σ = 13020435571062. Its totient is φ = 13020435571060.

The previous prime is 13020435571001. The next prime is 13020435571097. The reversal of 13020435571061 is 16017553402031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11208735723025 + 1811699848036 = 3347945^2 + 1345994^2 .

It is a cyclic number.

It is not a de Polignac number, because 13020435571061 - 2¹⁸ = 13020435308917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13020435571001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510217785530 + 6510217785531.

It is an arithmetic number, because the mean of its divisors is an integer number (6510217785531).

Almost surely, 2^{13020435571061} is an apocalyptic number.

It is an amenable number.

13020435571061 is a deficient number, since it is larger than the sum of its proper divisors (1).

13020435571061 is an equidigital number, since it uses as much as digits as its factorization.

13020435571061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

Adding to 13020435571061 its reverse (16017553402031), we get a palindrome (29037988973092).

The spelling of 13020435571061 in words is "thirteen trillion, twenty billion, four hundred thirty-five million, five hundred seventy-one thousand, sixty-one".