100221121010 has 16 divisors (see below), whose sum is σ = 180731480472. Its totient is φ = 40014345600.

The previous prime is 100221120959. The next prime is 100221121057. The reversal of 100221121010 is 10121122001.

It can be written as a sum of positive squares in 4 ways, for example, as 56695895881 + 43525225129 = 238109^2 + 208627^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100221120982 and 100221121000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9257171 + ... + 9267990.

Almost surely, 2^100221121010 is an apocalyptic number.

100221121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100221121010 is a deficient number, since it is larger than the sum of its proper divisors (80510359462).

100221121010 is a wasteful number, since it uses less digits than its factorization.

100221121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18525709.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100221121010 its reverse (10121122001), we get a palindrome (110342243011).

Subtracting from 100221121010 its reverse (10121122001), we obtain a palindrome (90099999009).

The spelling of 100221121010 in words is "one hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, ten".