20112220100101 has 4 divisors (see below), whose sum is σ = 20602762053804. Its totient is φ = 19621678146400.

The previous prime is 20112220100087. The next prime is 20112220100201. The reversal of 20112220100101 is 10100102221102.

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 3817232843076 + 16294987257025 = 1953774^2 + 4036705^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112220100101 - 2²⁹ = 20111683229189 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 (20112220100201) 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, 245270976790 + ... + 245270976871.

It is an arithmetic number, because the mean of its divisors is an integer number (5150690513451).

Almost surely, 2^{20112220100101} is an apocalyptic number.

It is an amenable number.

20112220100101 is a deficient number, since it is larger than the sum of its proper divisors (490541953703).

20112220100101 is an equidigital number, since it uses as much as digits as its factorization.

20112220100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490541953702.

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

Adding to 20112220100101 its reverse (10100102221102), we get a palindrome (30212322321203).

The spelling of 20112220100101 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, one hundred thousand, one hundred one".