100101232001221 has 16 divisors (see below), whose sum is σ = 110104673602176. Its totient is φ = 91000426440000.

The previous prime is 100101232001191. The next prime is 100101232001227. The reversal of 100101232001221 is 122100232101001.

It is not a de Polignac number, because 100101232001221 - 2²⁷ = 100101097783493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100101232001195 and 100101232001204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100101232001227) 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, 270475261 + ... + 270845101.

It is an arithmetic number, because the mean of its divisors is an integer number (6881542100136).

Almost surely, 2^{100101232001221} is an apocalyptic number.

100101232001221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100101232001221 is a deficient number, since it is larger than the sum of its proper divisors (10003441600955).

100101232001221 is an equidigital number, since it uses as much as digits as its factorization.

100101232001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573225 (or 573203 counting only the distinct ones).

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

Adding to 100101232001221 its reverse (122100232101001), we get a palindrome (222201464102222).

The spelling of 100101232001221 in words is "one hundred trillion, one hundred one billion, two hundred thirty-two million, one thousand, two hundred twenty-one".