10221211101181 has 2 divisors, whose sum is σ = 10221211101182. Its totient is φ = 10221211101180.

The previous prime is 10221211101173. The next prime is 10221211101221. The reversal of 10221211101181 is 18110111212201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9687594000100 + 533617101081 = 3112490^2 + 730491^2 .

It is an emirp because it is prime and its reverse (18110111212201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10221211101181 - 2³ = 10221211101173 is a prime.

It is a super-2 number, since 2×10221211101181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10221211101151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110605550590 + 5110605550591.

It is an arithmetic number, because the mean of its divisors is an integer number (5110605550591).

Almost surely, 2^{10221211101181} is an apocalyptic number.

It is an amenable number.

10221211101181 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221211101181 is an equidigital number, since it uses as much as digits as its factorization.

10221211101181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 22.

Adding to 10221211101181 its reverse (18110111212201), we get a palindrome (28331322313382).

The spelling of 10221211101181 in words is "ten trillion, two hundred twenty-one billion, two hundred eleven million, one hundred one thousand, one hundred eighty-one".