20012001212201 has 4 divisors (see below), whose sum is σ = 20015994831504. Its totient is φ = 20008007592900.

The previous prime is 20012001212191. The next prime is 20012001212209. The reversal of 20012001212201 is 10221210021002.

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 20012001212201 - 2¹⁸ = 20012000950057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012001212209) 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, 1996802135 + ... + 1996812156.

It is an arithmetic number, because the mean of its divisors is an integer number (5003998707876).

Almost surely, 2^{20012001212201} is an apocalyptic number.

It is an amenable number.

20012001212201 is a deficient number, since it is larger than the sum of its proper divisors (3993619303).

20012001212201 is an equidigital number, since it uses as much as digits as its factorization.

20012001212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993619302.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20012001212201 its reverse (10221210021002), we get a palindrome (30233211233203).

The spelling of 20012001212201 in words is "twenty trillion, twelve billion, one million, two hundred twelve thousand, two hundred one".