100000020000221 has 4 divisors (see below), whose sum is σ = 109090930909344. Its totient is φ = 90909109091100.

The previous prime is 100000020000131. The next prime is 100000020000269. The reversal of 100000020000221 is 122000020000001.

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 100000020000221 - 2¹⁰ = 100000019999197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100000020000199 and 100000020000208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000020009221) 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, 4545455454545 + ... + 4545455454566.

It is an arithmetic number, because the mean of its divisors is an integer number (27272732727336).

Almost surely, 2^{100000020000221} is an apocalyptic number.

100000020000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100000020000221 is a deficient number, since it is larger than the sum of its proper divisors (9090910909123).

100000020000221 is an equidigital number, since it uses as much as digits as its factorization.

100000020000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090910909122.

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

Adding to 100000020000221 its reverse (122000020000001), we get a palindrome (222000040000222).

The spelling of 100000020000221 in words is "one hundred trillion, twenty million, two hundred twenty-one", and thus it is an aban number.