20012112210001 has 4 divisors (see below), whose sum is σ = 20012161945600. Its totient is φ = 20012062474404.

The previous prime is 20012112209989. The next prime is 20012112210049. The reversal of 20012112210001 is 10001221121002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20012112210001 - 2²⁹ = 20011575339089 is a prime.

It is a super-2 number, since 2×20012112210001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012112210301) 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, 24259281 + ... + 25070638.

It is an arithmetic number, because the mean of its divisors is an integer number (5003040486400).

Almost surely, 2^{20012112210001} is an apocalyptic number.

It is an amenable number.

20012112210001 is a deficient number, since it is larger than the sum of its proper divisors (49735599).

20012112210001 is an equidigital number, since it uses as much as digits as its factorization.

20012112210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49735598.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20012112210001 its reverse (10001221121002), we get a palindrome (30013333331003).

The spelling of 20012112210001 in words is "twenty trillion, twelve billion, one hundred twelve million, two hundred ten thousand, one".