2100020001161 has 2 divisors, whose sum is σ = 2100020001162. Its totient is φ = 2100020001160.

The previous prime is 2100020001089. The next prime is 2100020001179. The reversal of 2100020001161 is 1611000200012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198576092025 + 901443909136 = 1094795^2 + 949444^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100020001161 - 2³⁰ = 2098946259337 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100020001361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050010000580 + 1050010000581.

It is an arithmetic number, because the mean of its divisors is an integer number (1050010000581).

Almost surely, 2^{2100020001161} is an apocalyptic number.

It is an amenable number.

2100020001161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100020001161 is an equidigital number, since it uses as much as digits as its factorization.

2100020001161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2100020001161 its reverse (1611000200012), we get a palindrome (3711020201173).

The spelling of 2100020001161 in words is "two trillion, one hundred billion, twenty million, one thousand, one hundred sixty-one".