136610203021 has 2 divisors, whose sum is σ = 136610203022. Its totient is φ = 136610203020.

The previous prime is 136610202973. The next prime is 136610203031. The reversal of 136610203021 is 120302016631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135634577796 + 975625225 = 368286^2 + 31235^2 .

It is a cyclic number.

It is not a de Polignac number, because 136610203021 - 2¹⁵ = 136610170253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136610203031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68305101510 + 68305101511.

It is an arithmetic number, because the mean of its divisors is an integer number (68305101511).

Almost surely, 2^136610203021 is an apocalyptic number.

It is an amenable number.

136610203021 is a deficient number, since it is larger than the sum of its proper divisors (1).

136610203021 is an equidigital number, since it uses as much as digits as its factorization.

136610203021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 136610203021 its reverse (120302016631), we get a palindrome (256912219652).

The spelling of 136610203021 in words is "one hundred thirty-six billion, six hundred ten million, two hundred three thousand, twenty-one".