11013212540 has 96 divisors (see below), whose sum is σ = 26089475328. Its totient is φ = 3870272000.

The previous prime is 11013212531. The next prime is 11013212593. The reversal of 11013212540 is 4521231011.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 959435 + ... + 970845.

It is an arithmetic number, because the mean of its divisors is an integer number (271765368).

Almost surely, 2^11013212540 is an apocalyptic number.

11013212540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11013212540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13044737664).

11013212540 is an abundant number, since it is smaller than the sum of its proper divisors (15076262788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11013212540 is a wasteful number, since it uses less digits than its factorization.

11013212540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11579 (or 11577 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 11013212540 its reverse (4521231011), we get a palindrome (15534443551).

The spelling of 11013212540 in words is "eleven billion, thirteen million, two hundred twelve thousand, five hundred forty".