100221101020091 has 8 divisors (see below), whose sum is σ = 105053088308784. Its totient is φ = 95502807550080.

The previous prime is 100221101020081. The next prime is 100221101020207. The reversal of 100221101020091 is 190020101122001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221101020091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100221101020031) 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, 28423452866 + ... + 28423456391.

It is an arithmetic number, because the mean of its divisors is an integer number (13131636038598).

Almost surely, 2^{100221101020091} is an apocalyptic number.

100221101020091 is a deficient number, since it is larger than the sum of its proper divisors (4831987288693).

100221101020091 is an equidigital number, since it uses as much as digits as its factorization.

100221101020091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56846909341.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 100221101020091 its reverse (190020101122001), we get a palindrome (290241202142092).

The spelling of 100221101020091 in words is "one hundred trillion, two hundred twenty-one billion, one hundred one million, twenty thousand, ninety-one".