21120002011 has 8 divisors (see below), whose sum is σ = 22039879680. Its totient is φ = 20200259112.

The previous prime is 21120002009. The next prime is 21120002017. The reversal of 21120002011 is 11020002112.

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 21120002011 - 2¹ = 21120002009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120002017) 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, 412326 + ... + 460708.

It is an arithmetic number, because the mean of its divisors is an integer number (2754984960).

Almost surely, 2^21120002011 is an apocalyptic number.

21120002011 is a deficient number, since it is larger than the sum of its proper divisors (919877669).

21120002011 is a wasteful number, since it uses less digits than its factorization.

21120002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67385.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21120002011 its reverse (11020002112), we get a palindrome (32140004123).

The spelling of 21120002011 in words is "twenty-one billion, one hundred twenty million, two thousand, eleven".