100001220120221 has 8 divisors (see below), whose sum is σ = 114918529200384. Its totient is φ = 85241766162960.

The previous prime is 100001220120211. The next prime is 100001220120233. The reversal of 100001220120221 is 122021022100001.

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 100001220120221 - 2⁴⁶ = 29632475942557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100001220120196 and 100001220120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001220120211) 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, 39463779365 + ... + 39463781898.

It is an arithmetic number, because the mean of its divisors is an integer number (14364816150048).

Almost surely, 2^{100001220120221} is an apocalyptic number.

It is an amenable number.

100001220120221 is a deficient number, since it is larger than the sum of its proper divisors (14917309080163).

100001220120221 is an equidigital number, since it uses as much as digits as its factorization.

100001220120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78927561451.

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

Adding to 100001220120221 its reverse (122021022100001), we get a palindrome (222022242220222).

The spelling of 100001220120221 in words is "one hundred trillion, one billion, two hundred twenty million, one hundred twenty thousand, two hundred twenty-one".