20101120011 has 18 divisors (see below), whose sum is σ = 33775352052. Its totient is φ = 11486354040.

The previous prime is 20101120007. The next prime is 20101120019. The reversal of 20101120011 is 11002110102.

It is a happy number.

It is not a de Polignac number, because 20101120011 - 2² = 20101120007 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 = 20101119975 and 20101120002.

It is not an unprimeable number, because it can be changed into a prime (20101120019) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22789945 + ... + 22790826.

Almost surely, 2^20101120011 is an apocalyptic number.

20101120011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20101120011 is a deficient number, since it is larger than the sum of its proper divisors (13674232041).

20101120011 is a wasteful number, since it uses less digits than its factorization.

20101120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45580791 (or 45580781 counting only the distinct ones).

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

Adding to 20101120011 its reverse (11002110102), we get a palindrome (31103230113).

Subtracting from 20101120011 its reverse (11002110102), we obtain a palindrome (9099009909).

The spelling of 20101120011 in words is "twenty billion, one hundred one million, one hundred twenty thousand, eleven".