20120011 has 4 divisors (see below), whose sum is σ = 20168224. Its totient is φ = 20071800.

The previous prime is 20119991. The next prime is 20120029. The reversal of 20120011 is 11002102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20120011 - 2¹¹ = 20117963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20119976 and 20120003.

It is not an unprimeable number, because it can be changed into a prime (20120071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23475 + ... + 24316.

It is an arithmetic number, because the mean of its divisors is an integer number (5042056).

Almost surely, 2^20120011 is an apocalyptic number.

20120011 is a deficient number, since it is larger than the sum of its proper divisors (48213).

20120011 is an equidigital number, since it uses as much as digits as its factorization.

20120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48212.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 20120011 is about 4485.5335245654. The cubic root of 20120011 is about 271.9836125868.

Adding to 20120011 its reverse (11002102), we get a palindrome (31122113).

The spelling of 20120011 in words is "twenty million, one hundred twenty thousand, eleven".