100001221200221 has 4 divisors (see below), whose sum is σ = 109092241309344. Its totient is φ = 90910201091100.

The previous prime is 100001221200163. The next prime is 100001221200277. The reversal of 100001221200221 is 122002122100001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100001221200221 - 2⁶ = 100001221200157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001221200196 and 100001221200205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001221200521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545510054545 + ... + 4545510054566.

It is an arithmetic number, because the mean of its divisors is an integer number (27273060327336).

Almost surely, 2^{100001221200221} is an apocalyptic number.

100001221200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100001221200221 is a deficient number, since it is larger than the sum of its proper divisors (9091020109123).

100001221200221 is an equidigital number, since it uses as much as digits as its factorization.

100001221200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091020109122.

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

Adding to 100001221200221 its reverse (122002122100001), we get a palindrome (222003343300222).

The spelling of 100001221200221 in words is "one hundred trillion, one billion, two hundred twenty-one million, two hundred thousand, two hundred twenty-one".