100221202212021 has 20 divisors (see below), whose sum is σ = 163323440643264. Its totient is φ = 60740122552200.

The previous prime is 100221202212011. The next prime is 100221202212029. The reversal of 100221202212021 is 120212202122001.

It is a happy number.

100221202212021 is a `hidden beast` number, since 1 + 0 + 0 + 221 + 20 + 221 + 202 + 1 = 666.

It is not a de Polignac number, because 100221202212021 - 2⁹ = 100221202211509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100221202211985 and 100221202212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221202212029) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56240853325 + ... + 56240855106.

Almost surely, 2^{100221202212021} is an apocalyptic number.

100221202212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100221202212021 is a deficient number, since it is larger than the sum of its proper divisors (63102238431243).

100221202212021 is a wasteful number, since it uses less digits than its factorization.

100221202212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112481708454 (or 112481708445 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 100221202212021 its reverse (120212202122001), we get a palindrome (220433404334022).

The spelling of 100221202212021 in words is "one hundred trillion, two hundred twenty-one billion, two hundred two million, two hundred twelve thousand, twenty-one".