100100220993 has 6 divisors (see below), whose sum is σ = 144589208114. Its totient is φ = 66733480656.

The previous prime is 100100220991. The next prime is 100100221009. The reversal of 100100220993 is 399022001001.

It can be written as a sum of positive squares in only one way, i.e., 94392116289 + 5708104704 = 307233^2 + 75552^2 .

It is not a de Polignac number, because 100100220993 - 2¹ = 100100220991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100100220991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5561123380 + ... + 5561123397.

Almost surely, 2^100100220993 is an apocalyptic number.

It is an amenable number.

100100220993 is a deficient number, since it is larger than the sum of its proper divisors (44488987121).

100100220993 is a wasteful number, since it uses less digits than its factorization.

100100220993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11122246783 (or 11122246780 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

Adding to 100100220993 its reverse (399022001001), we get a palindrome (499122221994).

The spelling of 100100220993 in words is "one hundred billion, one hundred million, two hundred twenty thousand, nine hundred ninety-three".