100221012100001 has 4 divisors (see below), whose sum is σ = 107930320723092. Its totient is φ = 92511703476912.

The previous prime is 100221012099883. The next prime is 100221012100061. The reversal of 100221012100001 is 100001210122001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59309944677025 + 40911067422976 = 7701295^2 + 6396176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221012100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100221012100061) 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, 3854654311526 + ... + 3854654311551.

It is an arithmetic number, because the mean of its divisors is an integer number (26982580180773).

Almost surely, 2^{100221012100001} is an apocalyptic number.

It is an amenable number.

100221012100001 is a deficient number, since it is larger than the sum of its proper divisors (7709308623091).

100221012100001 is an equidigital number, since it uses as much as digits as its factorization.

100221012100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7709308623090.

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

Adding to 100221012100001 its reverse (100001210122001), we get a palindrome (200222222222002).

The spelling of 100221012100001 in words is "one hundred trillion, two hundred twenty-one billion, twelve million, one hundred thousand, one".