20010211133161 has 2 divisors, whose sum is σ = 20010211133162. Its totient is φ = 20010211133160.

The previous prime is 20010211133147. The next prime is 20010211133291. The reversal of 20010211133161 is 16133111201002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16060376851600 + 3949834281561 = 4007540^2 + 1987419^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010211133161 - 2³¹ = 20008063649513 is a prime.

It is not a weakly prime, because it can be changed into another prime (20010211133761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005105566580 + 10005105566581.

It is an arithmetic number, because the mean of its divisors is an integer number (10005105566581).

Almost surely, 2^{20010211133161} is an apocalyptic number.

It is an amenable number.

20010211133161 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010211133161 is an equidigital number, since it uses as much as digits as its factorization.

20010211133161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 20010211133161 its reverse (16133111201002), we get a palindrome (36143322334163).

The spelling of 20010211133161 in words is "twenty trillion, ten billion, two hundred eleven million, one hundred thirty-three thousand, one hundred sixty-one".