20001201001111 has 8 divisors (see below), whose sum is σ = 21841825167504. Its totient is φ = 18164299029120.

The previous prime is 20001201001109. The next prime is 20001201001121. The reversal of 20001201001111 is 11110010210002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001201001111 - 2¹ = 20001201001109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001201001121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930537360 + ... + 930558853.

It is an arithmetic number, because the mean of its divisors is an integer number (2730228145938).

Almost surely, 2^{20001201001111} is an apocalyptic number.

20001201001111 is a deficient number, since it is larger than the sum of its proper divisors (1840624166393).

20001201001111 is a wasteful number, since it uses less digits than its factorization.

20001201001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861097201.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20001201001111 its reverse (11110010210002), we get a palindrome (31111211211113).

The spelling of 20001201001111 in words is "twenty trillion, one billion, two hundred one million, one thousand, one hundred eleven".