100221221111001 has 4 divisors (see below), whose sum is σ = 133628294814672. Its totient is φ = 66814147407332.

The previous prime is 100221221110961. The next prime is 100221221111009. The reversal of 100221221111001 is 100111122122001.

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 100221221111001 - 2³³ = 100212631176409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100221221111009) 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, 16703536851831 + ... + 16703536851836.

It is an arithmetic number, because the mean of its divisors is an integer number (33407073703668).

Almost surely, 2^{100221221111001} is an apocalyptic number.

It is an amenable number.

100221221111001 is a deficient number, since it is larger than the sum of its proper divisors (33407073703671).

100221221111001 is an equidigital number, since it uses as much as digits as its factorization.

100221221111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33407073703670.

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

Adding to 100221221111001 its reverse (100111122122001), we get a palindrome (200332343233002).

The spelling of 100221221111001 in words is "one hundred trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, one".