1011222102181 has 2 divisors, whose sum is σ = 1011222102182. Its totient is φ = 1011222102180.

The previous prime is 1011222102103. The next prime is 1011222102229. The reversal of 1011222102181 is 1812012221101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 942761379681 + 68460722500 = 970959^2 + 261650^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011222102181 - 2³⁹ = 461466288293 is a prime.

It is a super-4 number, since 4×1011222102181⁴ (a number of 49 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011222102481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505611051090 + 505611051091.

It is an arithmetic number, because the mean of its divisors is an integer number (505611051091).

Almost surely, 2^{1011222102181} is an apocalyptic number.

It is an amenable number.

1011222102181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011222102181 is an equidigital number, since it uses as much as digits as its factorization.

1011222102181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 1011222102181 its reverse (1812012221101), we get a palindrome (2823234323282).

The spelling of 1011222102181 in words is "one trillion, eleven billion, two hundred twenty-two million, one hundred two thousand, one hundred eighty-one".