20011212120001 has 4 divisors (see below), whose sum is σ = 20051314750000. Its totient is φ = 19971109490004.

The previous prime is 20011212119999. The next prime is 20011212120023. The reversal of 20011212120001 is 10002121211002.

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 20011212120001 - 2¹ = 20011212119999 is a prime.

It is a super-2 number, since 2×20011212120001² (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 (20011212130001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20051314251 + ... + 20051315248.

It is an arithmetic number, because the mean of its divisors is an integer number (5012828687500).

Almost surely, 2^{20011212120001} is an apocalyptic number.

It is an amenable number.

20011212120001 is a deficient number, since it is larger than the sum of its proper divisors (40102629999).

20011212120001 is an equidigital number, since it uses as much as digits as its factorization.

20011212120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40102629998.

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

Adding to 20011212120001 its reverse (10002121211002), we get a palindrome (30013333331003).

The spelling of 20011212120001 in words is "twenty trillion, eleven billion, two hundred twelve million, one hundred twenty thousand, one".