20012222112101 has 4 divisors (see below), whose sum is σ = 20013276904812. Its totient is φ = 20011167319392.

The previous prime is 20012222112097. The next prime is 20012222112137. The reversal of 20012222112101 is 10121122221002.

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 3476621284900 + 16535600827201 = 1864570^2 + 4066399^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012222112101 - 2² = 20012222112097 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 20012222112101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012222112601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 527367896 + ... + 527405841.

It is an arithmetic number, because the mean of its divisors is an integer number (5003319226203).

Almost surely, 2^{20012222112101} is an apocalyptic number.

It is an amenable number.

20012222112101 is a deficient number, since it is larger than the sum of its proper divisors (1054792711).

20012222112101 is a wasteful number, since it uses less digits than its factorization.

20012222112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054792710.

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

Adding to 20012222112101 its reverse (10121122221002), we get a palindrome (30133344333103).

The spelling of 20012222112101 in words is "twenty trillion, twelve billion, two hundred twenty-two million, one hundred twelve thousand, one hundred one".