100020020012221 has 16 divisors (see below), whose sum is σ = 100334388503808. Its totient is φ = 99705996544000.

The previous prime is 100020020012207. The next prime is 100020020012249. The reversal of 100020020012221 is 122210020020001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 100020020012221 - 2⁵ = 100020020012189 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 (100020020012281) 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 15 ways as a sum of consecutive naturals, for example, 5016793965 + ... + 5016813901.

It is an arithmetic number, because the mean of its divisors is an integer number (6270899281488).

Almost surely, 2^{100020020012221} is an apocalyptic number.

It is an amenable number.

100020020012221 is a deficient number, since it is larger than the sum of its proper divisors (314368491587).

100020020012221 is a wasteful number, since it uses less digits than its factorization.

100020020012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27812.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100020020012221 its reverse (122210020020001), we get a palindrome (222230040032222).

The spelling of 100020020012221 in words is "one hundred trillion, twenty billion, twenty million, twelve thousand, two hundred twenty-one".