100001210012221 has 32 divisors (see below), whose sum is σ = 119793278453760. Its totient is φ = 81713826129600.

The previous prime is 100001210012173. The next prime is 100001210012233. The reversal of 100001210012221 is 122210012100001.

It is not a de Polignac number, because 100001210012221 - 2⁹ = 100001210011709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001210012021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26164851 + ... + 29742256.

It is an arithmetic number, because the mean of its divisors is an integer number (3743539951680).

Almost surely, 2^{100001210012221} is an apocalyptic number.

It is an amenable number.

100001210012221 is a deficient number, since it is larger than the sum of its proper divisors (19792068441539).

100001210012221 is an equidigital number, since it uses as much as digits as its factorization.

100001210012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55907305.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 100001210012221 its reverse (122210012100001), we get a palindrome (222211222112222).

The spelling of 100001210012221 in words is "one hundred trillion, one billion, two hundred ten million, twelve thousand, two hundred twenty-one".