20112243101 has 4 divisors (see below), whose sum is σ = 20122438812. Its totient is φ = 20102047392.

The previous prime is 20112243097. The next prime is 20112243103. The reversal of 20112243101 is 10134221102.

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 5579940601 + 14532302500 = 74699^2 + 120550^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112243101 - 2² = 20112243097 is a prime.

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 20112243101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112243103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5094896 + ... + 5098841.

It is an arithmetic number, because the mean of its divisors is an integer number (5030609703).

Almost surely, 2^20112243101 is an apocalyptic number.

It is an amenable number.

20112243101 is a deficient number, since it is larger than the sum of its proper divisors (10195711).

20112243101 is a wasteful number, since it uses less digits than its factorization.

20112243101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10195710.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20112243101 its reverse (10134221102), we get a palindrome (30246464203).

The spelling of 20112243101 in words is "twenty billion, one hundred twelve million, two hundred forty-three thousand, one hundred one".