100221001012061 has 2 divisors, whose sum is σ = 100221001012062. Its totient is φ = 100221001012060.

The previous prime is 100221001012051. The next prime is 100221001012157. The reversal of 100221001012061 is 160210100122001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73476526704025 + 26744474308036 = 8571845^2 + 5171506^2 .

It is a cyclic number.

It is not a de Polignac number, because 100221001012061 - 2²⁶ = 100220933903197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100221001012051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110500506030 + 50110500506031.

It is an arithmetic number, because the mean of its divisors is an integer number (50110500506031).

Almost surely, 2^{100221001012061} is an apocalyptic number.

It is an amenable number.

100221001012061 is a deficient number, since it is larger than the sum of its proper divisors (1).

100221001012061 is an equidigital number, since it uses as much as digits as its factorization.

100221001012061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 100221001012061 its reverse (160210100122001), we get a palindrome (260431101134062).

The spelling of 100221001012061 in words is "one hundred trillion, two hundred twenty-one billion, one million, twelve thousand, sixty-one".