221210100079 has 2 divisors, whose sum is σ = 221210100080. Its totient is φ = 221210100078.

The previous prime is 221210100047. The next prime is 221210100101. The reversal of 221210100079 is 970001012122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221210100079 - 2⁵ = 221210100047 is a prime.

It is a super-2 number, since 2×221210100079² (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 (221210100479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605050039 + 110605050040.

It is an arithmetic number, because the mean of its divisors is an integer number (110605050040).

Almost surely, 2^221210100079 is an apocalyptic number.

221210100079 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210100079 is an equidigital number, since it uses as much as digits as its factorization.

221210100079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 221210100079 in words is "two hundred twenty-one billion, two hundred ten million, one hundred thousand, seventy-nine".