10111211161 has 2 divisors, whose sum is σ = 10111211162. Its totient is φ = 10111211160.

The previous prime is 10111211083. The next prime is 10111211167. The reversal of 10111211161 is 16111211101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7403569936 + 2707641225 = 86044^2 + 52035^2 .

It is a cyclic number.

It is not a de Polignac number, because 10111211161 - 2¹⁵ = 10111178393 is a prime.

It is a super-2 number, since 2×10111211161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10111211167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5055605580 + 5055605581.

It is an arithmetic number, because the mean of its divisors is an integer number (5055605581).

Almost surely, 2^10111211161 is an apocalyptic number.

It is an amenable number.

10111211161 is a deficient number, since it is larger than the sum of its proper divisors (1).

10111211161 is an equidigital number, since it uses as much as digits as its factorization.

10111211161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 10111211161 its reverse (16111211101), we get a palindrome (26222422262).

The spelling of 10111211161 in words is "ten billion, one hundred eleven million, two hundred eleven thousand, one hundred sixty-one".