100221121011 has 16 divisors (see below), whose sum is σ = 145811594880. Its totient is φ = 60725315520.

The previous prime is 100221120959. The next prime is 100221121057. The reversal of 100221121011 is 110121122001.

It is not a de Polignac number, because 100221121011 - 2⁹ = 100221120499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100221121211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230290 + ... + 503463.

It is an arithmetic number, because the mean of its divisors is an integer number (9113224680).

Almost surely, 2^100221121011 is an apocalyptic number.

100221121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100221121011 is a deficient number, since it is larger than the sum of its proper divisors (45590473869).

100221121011 is a wasteful number, since it uses less digits than its factorization.

100221121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737906.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100221121011 its reverse (110121122001), we get a palindrome (210342243012).

The spelling of 100221121011 in words is "one hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, eleven".