136012021 has 2 divisors, whose sum is σ = 136012022. Its totient is φ = 136012020.

The previous prime is 136012003. The next prime is 136012069. The reversal of 136012021 is 120210631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107868996 + 28143025 = 10386^2 + 5305^2 .

It is a cyclic number.

It is not a de Polignac number, because 136012021 - 2⁷ = 136011893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136011986 and 136012004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136012421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68006010 + 68006011.

It is an arithmetic number, because the mean of its divisors is an integer number (68006011).

Almost surely, 2^136012021 is an apocalyptic number.

It is an amenable number.

136012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

136012021 is an equidigital number, since it uses as much as digits as its factorization.

136012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 136012021 is about 11662.4191744252. The cubic root of 136012021 is about 514.2714693402.

Adding to 136012021 its reverse (120210631), we get a palindrome (256222652).

The spelling of 136012021 in words is "one hundred thirty-six million, twelve thousand, twenty-one".