20001210021137 has 2 divisors, whose sum is σ = 20001210021138. Its totient is φ = 20001210021136.

The previous prime is 20001210021053. The next prime is 20001210021181. The reversal of 20001210021137 is 73112001210002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19964668257856 + 36541763281 = 4468184^2 + 191159^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001210021137 - 2²⁰ = 20001208972561 is a prime.

It is not a weakly prime, because it can be changed into another prime (20001210020137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605010568 + 10000605010569.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605010569).

Almost surely, 2^{20001210021137} is an apocalyptic number.

It is an amenable number.

20001210021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001210021137 is an equidigital number, since it uses as much as digits as its factorization.

20001210021137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 20001210021137 its reverse (73112001210002), we get a palindrome (93113211231139).

The spelling of 20001210021137 in words is "twenty trillion, one billion, two hundred ten million, twenty-one thousand, one hundred thirty-seven".