20111120202001 has 4 divisors (see below), whose sum is σ = 20144252196352. Its totient is φ = 20077988207652.

The previous prime is 20111120201999. The next prime is 20111120202007. The reversal of 20111120202001 is 10020202111102.

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 20111120202001 - 2¹ = 20111120201999 is a prime.

It is a super-4 number, since 4×20111120202001⁴ (a number of 54 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111120202007) 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, 16565996265 + ... + 16565997478.

It is an arithmetic number, because the mean of its divisors is an integer number (5036063049088).

Almost surely, 2^{20111120202001} is an apocalyptic number.

It is an amenable number.

20111120202001 is a deficient number, since it is larger than the sum of its proper divisors (33131994351).

20111120202001 is an equidigital number, since it uses as much as digits as its factorization.

20111120202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33131994350.

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

Adding to 20111120202001 its reverse (10020202111102), we get a palindrome (30131322313103).

The spelling of 20111120202001 in words is "twenty trillion, one hundred eleven billion, one hundred twenty million, two hundred two thousand, one".