210021201012137 has 2 divisors, whose sum is σ = 210021201012138. Its totient is φ = 210021201012136.

The previous prime is 210021201012101. The next prime is 210021201012151. The reversal of 210021201012137 is 731210102120012.

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., 114206390454121 + 95814810558016 = 10686739^2 + 9788504^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021201012137 - 2²⁴ = 210021184234921 is a prime.

It is not a weakly prime, because it can be changed into another prime (210021201017137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010600506068 + 105010600506069.

It is an arithmetic number, because the mean of its divisors is an integer number (105010600506069).

Almost surely, 2^{210021201012137} is an apocalyptic number.

It is an amenable number.

210021201012137 is a deficient number, since it is larger than the sum of its proper divisors (1).

210021201012137 is an equidigital number, since it uses as much as digits as its factorization.

210021201012137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 210021201012137 its reverse (731210102120012), we get a palindrome (941231303132149).

The spelling of 210021201012137 in words is "two hundred ten trillion, twenty-one billion, two hundred one million, twelve thousand, one hundred thirty-seven".