101222155165 has 4 divisors (see below), whose sum is σ = 121466586204. Its totient is φ = 80977724128.

The previous prime is 101222155163. The next prime is 101222155189. The reversal of 101222155165 is 561551222101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32709616164 + 68512539001 = 180858^2 + 261749^2 .

It is a cyclic number.

It is not a de Polignac number, because 101222155165 - 2¹ = 101222155163 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101222155163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10122215512 + ... + 10122215521.

It is an arithmetic number, because the mean of its divisors is an integer number (30366646551).

Almost surely, 2^101222155165 is an apocalyptic number.

It is an amenable number.

101222155165 is a deficient number, since it is larger than the sum of its proper divisors (20244431039).

101222155165 is an equidigital number, since it uses as much as digits as its factorization.

101222155165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20244431038.

The product of its (nonzero) digits is 6000, while the sum is 31.

Adding to 101222155165 its reverse (561551222101), we get a palindrome (662773377266).

The spelling of 101222155165 in words is "one hundred one billion, two hundred twenty-two million, one hundred fifty-five thousand, one hundred sixty-five".