100002011001221 has 4 divisors (see below), whose sum is σ = 114288012572832. Its totient is φ = 85716009429612.

The previous prime is 100002011001199. The next prime is 100002011001227. The reversal of 100002011001221 is 122100110200001.

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 100002011001221 - 2¹⁸ = 100002010739077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002011001227) 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, 7143000785795 + ... + 7143000785808.

It is an arithmetic number, because the mean of its divisors is an integer number (28572003143208).

Almost surely, 2^{100002011001221} is an apocalyptic number.

It is an amenable number.

100002011001221 is a deficient number, since it is larger than the sum of its proper divisors (14286001571611).

100002011001221 is an equidigital number, since it uses as much as digits as its factorization.

100002011001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14286001571610.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100002011001221 its reverse (122100110200001), we get a palindrome (222102121201222).

The spelling of 100002011001221 in words is "one hundred trillion, two billion, eleven million, one thousand, two hundred twenty-one".