100221212021 has 16 divisors (see below), whose sum is σ = 121284501120. Its totient is φ = 80845117440.

The previous prime is 100221212017. The next prime is 100221212041. The reversal of 100221212021 is 120212122001.

It is a cyclic number.

It is not a de Polignac number, because 100221212021 - 2² = 100221212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100221211987 and 100221212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221212041) 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, 3064526 + ... + 3097056.

It is an arithmetic number, because the mean of its divisors is an integer number (7580281320).

Almost surely, 2^100221212021 is an apocalyptic number.

It is an amenable number.

100221212021 is a deficient number, since it is larger than the sum of its proper divisors (21063289099).

100221212021 is a wasteful number, since it uses less digits than its factorization.

100221212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58444.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 100221212021 its reverse (120212122001), we get a palindrome (220433334022).

The spelling of 100221212021 in words is "one hundred billion, two hundred twenty-one million, two hundred twelve thousand, twenty-one".