20001210112101 has 16 divisors (see below), whose sum is σ = 27389319740864. Its totient is φ = 12973627522944.

The previous prime is 20001210112043. The next prime is 20001210112127. The reversal of 20001210112101 is 10121101210002.

It is not a de Polignac number, because 20001210112101 - 2⁷ = 20001210111973 is a prime.

It is a super-2 number, since 2×20001210112101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001210112141) 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 15 ways as a sum of consecutive naturals, for example, 10876401 + ... + 12581673.

It is an arithmetic number, because the mean of its divisors is an integer number (1711832483804).

Almost surely, 2^{20001210112101} is an apocalyptic number.

It is an amenable number.

20001210112101 is a deficient number, since it is larger than the sum of its proper divisors (7388109628763).

20001210112101 is a wasteful number, since it uses less digits than its factorization.

20001210112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810980.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20001210112101 its reverse (10121101210002), we get a palindrome (30122311322103).

The spelling of 20001210112101 in words is "twenty trillion, one billion, two hundred ten million, one hundred twelve thousand, one hundred one".