100221601021 has 8 divisors (see below), whose sum is σ = 100969936704. Its totient is φ = 99473508960.

The previous prime is 100221601009. The next prime is 100221601057. The reversal of 100221601021 is 120106122001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100221601021 - 2⁵ = 100221600989 is a prime.

It is a super-2 number, since 2×100221601021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100221600986 and 100221601004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221601121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 811326 + ... + 926656.

It is an arithmetic number, because the mean of its divisors is an integer number (12621242088).

Almost surely, 2^100221601021 is an apocalyptic number.

It is an amenable number.

100221601021 is a deficient number, since it is larger than the sum of its proper divisors (748335683).

100221601021 is a wasteful number, since it uses less digits than its factorization.

100221601021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121811.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 100221601021 its reverse (120106122001), we get a palindrome (220327723022).

The spelling of 100221601021 in words is "one hundred billion, two hundred twenty-one million, six hundred one thousand, twenty-one".