100111121210221 has 12 divisors (see below), whose sum is σ = 110069802912832. Its totient is φ = 90985045041000.

The previous prime is 100111121210143. The next prime is 100111121210251. The reversal of 100111121210221 is 122012121111001.

It is not a de Polignac number, because 100111121210221 - 2²¹ = 100111119113069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100111121210195 and 100111121210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100111121210251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113491335 + ... + 114370036.

Almost surely, 2^{100111121210221} is an apocalyptic number.

100111121210221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100111121210221 is a deficient number, since it is larger than the sum of its proper divisors (9958681702611).

100111121210221 is a wasteful number, since it uses less digits than its factorization.

100111121210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227865024 (or 227865013 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 100111121210221 its reverse (122012121111001), we get a palindrome (222123242321222).

The spelling of 100111121210221 in words is "one hundred trillion, one hundred eleven billion, one hundred twenty-one million, two hundred ten thousand, two hundred twenty-one".