11321012011 has 16 divisors (see below), whose sum is σ = 12115385568. Its totient is φ = 10541260800.

The previous prime is 11321011987. The next prime is 11321012023. The reversal of 11321012011 is 11021012311.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11321012011 - 2⁵ = 11321011979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11321011982 and 11321012000.

It is not an unprimeable number, because it can be changed into a prime (11321012111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1091731 + ... + 1102051.

It is an arithmetic number, because the mean of its divisors is an integer number (757211598).

Almost surely, 2^11321012011 is an apocalyptic number.

11321012011 is a deficient number, since it is larger than the sum of its proper divisors (794373557).

11321012011 is a wasteful number, since it uses less digits than its factorization.

11321012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11022.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11321012011 its reverse (11021012311), we get a palindrome (22342024322).

The spelling of 11321012011 in words is "eleven billion, three hundred twenty-one million, twelve thousand, eleven".