20212112220101 has 8 divisors (see below), whose sum is σ = 21401100788760. Its totient is φ = 19023128183808.

The previous prime is 20212112220037. The next prime is 20212112220151. The reversal of 20212112220101 is 10102221121202.

It can be written as a sum of positive squares in 4 ways, for example, as 389115076 + 20211723105025 = 19726^2 + 4495745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20212112220101 - 2⁶ = 20212112220037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20212112220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212112220151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13304015 + ... + 14745203.

It is an arithmetic number, because the mean of its divisors is an integer number (2675137598595).

Almost surely, 2^{20212112220101} is an apocalyptic number.

It is an amenable number.

20212112220101 is a deficient number, since it is larger than the sum of its proper divisors (1188988568659).

20212112220101 is a wasteful number, since it uses less digits than its factorization.

20212112220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266183.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20212112220101 its reverse (10102221121202), we get a palindrome (30314333341303).

The spelling of 20212112220101 in words is "twenty trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty thousand, one hundred one".