100010211211221 has 4 divisors (see below), whose sum is σ = 133346948281632. Its totient is φ = 66673474140812.

The previous prime is 100010211211219. The next prime is 100010211211327. The reversal of 100010211211221 is 122112112010001.

It is a happy number.

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 100010211211221 - 2¹ = 100010211211219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100010211211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100010211211921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16668368535201 + ... + 16668368535206.

It is an arithmetic number, because the mean of its divisors is an integer number (33336737070408).

Almost surely, 2^{100010211211221} is an apocalyptic number.

It is an amenable number.

100010211211221 is a deficient number, since it is larger than the sum of its proper divisors (33336737070411).

100010211211221 is an equidigital number, since it uses as much as digits as its factorization.

100010211211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33336737070410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100010211211221 its reverse (122112112010001), we get a palindrome (222122323221222).

The spelling of 100010211211221 in words is "one hundred trillion, ten billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-one".