20111210100101 has 4 divisors (see below), whose sum is σ = 20111229470892. Its totient is φ = 20111190729312.

The previous prime is 20111210100067. The next prime is 20111210100119. The reversal of 20111210100101 is 10100101211102.

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 6485706357025 + 13625503743076 = 2546705^2 + 3691274^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111210100101 - 2³⁴ = 20094030230917 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 (20111210100901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8034230 + ... + 10235783.

It is an arithmetic number, because the mean of its divisors is an integer number (5027807367723).

Almost surely, 2^{20111210100101} is an apocalyptic number.

It is an amenable number.

20111210100101 is a deficient number, since it is larger than the sum of its proper divisors (19370791).

20111210100101 is a wasteful number, since it uses less digits than its factorization.

20111210100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19370790.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20111210100101 its reverse (10100101211102), we get a palindrome (30211311311203).

The spelling of 20111210100101 in words is "twenty trillion, one hundred eleven billion, two hundred ten million, one hundred thousand, one hundred one".