100100221061 has 2 divisors, whose sum is σ = 100100221062. Its totient is φ = 100100221060.

The previous prime is 100100221043. The next prime is 100100221147. The reversal of 100100221061 is 160122001001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88857648100 + 11242572961 = 298090^2 + 106031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100100221061 is a prime.

It is a super-2 number, since 2×100100221061² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100100224061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50050110530 + 50050110531.

It is an arithmetic number, because the mean of its divisors is an integer number (50050110531).

Almost surely, 2^100100221061 is an apocalyptic number.

It is an amenable number.

100100221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

100100221061 is an equidigital number, since it uses as much as digits as its factorization.

100100221061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 100100221061 its reverse (160122001001), we get a palindrome (260222222062).

The spelling of 100100221061 in words is "one hundred billion, one hundred million, two hundred twenty-one thousand, sixty-one".