11000021013 has 12 divisors (see below), whose sum is σ = 15901243488. Its totient is φ = 7327659240.

The previous prime is 11000020979. The next prime is 11000021017. The reversal of 11000021013 is 31012000011.

It is not a de Polignac number, because 11000021013 - 2²¹ = 10997923861 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11000020986 and 11000021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000021017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461745 + ... + 484982.

It is an arithmetic number, because the mean of its divisors is an integer number (1325103624).

Almost surely, 2^11000021013 is an apocalyptic number.

It is an amenable number.

11000021013 is a deficient number, since it is larger than the sum of its proper divisors (4901222475).

11000021013 is a wasteful number, since it uses less digits than its factorization.

11000021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948024 (or 948021 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 11000021013 its reverse (31012000011), we get a palindrome (42012021024).

The spelling of 11000021013 in words is "eleven billion, twenty-one thousand, thirteen".