100320012221 has 16 divisors (see below), whose sum is σ = 117983089728. Its totient is φ = 84095616000.

The previous prime is 100320012211. The next prime is 100320012223. The reversal of 100320012221 is 122210023001.

It is a happy number.

It is not a de Polignac number, because 100320012221 - 2¹⁸ = 100319750077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100320012196 and 100320012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100320012223) 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, 234980 + ... + 505821.

It is an arithmetic number, because the mean of its divisors is an integer number (7373943108).

Almost surely, 2^100320012221 is an apocalyptic number.

100320012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100320012221 is a deficient number, since it is larger than the sum of its proper divisors (17663077507).

100320012221 is a wasteful number, since it uses less digits than its factorization.

100320012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741772.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 100320012221 its reverse (122210023001), we get a palindrome (222530035222).

The spelling of 100320012221 in words is "one hundred billion, three hundred twenty million, twelve thousand, two hundred twenty-one".