2011020212161 has 2 divisors, whose sum is σ = 2011020212162. Its totient is φ = 2011020212160.

The previous prime is 2011020212143. The next prime is 2011020212191. The reversal of 2011020212161 is 1612120201102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1974474625600 + 36545586561 = 1405160^2 + 191169^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011020212161 - 2²¹ = 2011018115009 is a prime.

It is not a weakly prime, because it can be changed into another prime (2011020212191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005510106080 + 1005510106081.

It is an arithmetic number, because the mean of its divisors is an integer number (1005510106081).

Almost surely, 2^{2011020212161} is an apocalyptic number.

It is an amenable number.

2011020212161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011020212161 is an equidigital number, since it uses as much as digits as its factorization.

2011020212161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2011020212161 its reverse (1612120201102), we get a palindrome (3623140413263).

The spelling of 2011020212161 in words is "two trillion, eleven billion, twenty million, two hundred twelve thousand, one hundred sixty-one".