20012011212001 has 4 divisors (see below), whose sum is σ = 20013331193604. Its totient is φ = 20010691230400.

The previous prime is 20012011211993. The next prime is 20012011212047. The reversal of 20012011212001 is 10021211021002.

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 11316825674401 + 8695185537600 = 3364049^2 + 2948760^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012011212001 - 2³ = 20012011211993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012011212071) 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, 659968060 + ... + 659998381.

It is an arithmetic number, because the mean of its divisors is an integer number (5003332798401).

Almost surely, 2^{20012011212001} is an apocalyptic number.

It is an amenable number.

20012011212001 is a deficient number, since it is larger than the sum of its proper divisors (1319981603).

20012011212001 is a wasteful number, since it uses less digits than its factorization.

20012011212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319981602.

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

Adding to 20012011212001 its reverse (10021211021002), we get a palindrome (30033222233003).

The spelling of 20012011212001 in words is "twenty trillion, twelve billion, eleven million, two hundred twelve thousand, one".