20110012011 has 48 divisors (see below), whose sum is σ = 31382028288. Its totient is φ = 12363436800.

The previous prime is 20110012009. The next prime is 20110012037. The reversal of 20110012011 is 11021001102.

It is a happy number.

It is not a de Polignac number, because 20110012011 - 2¹ = 20110012009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20110011984 and 20110012002.

It is not an unprimeable number, because it can be changed into a prime (20110012051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1952806 + ... + 1963076.

It is an arithmetic number, because the mean of its divisors is an integer number (653792256).

Almost surely, 2^20110012011 is an apocalyptic number.

20110012011 is a deficient number, since it is larger than the sum of its proper divisors (11272016277).

20110012011 is a wasteful number, since it uses less digits than its factorization.

20110012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10552 (or 10549 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20110012011 its reverse (11021001102), we get a palindrome (31131013113).

The spelling of 20110012011 in words is "twenty billion, one hundred ten million, twelve thousand, eleven".