11212013340 has 144 divisors (see below), whose sum is σ = 38006762976. Its totient is φ = 2651750400.

The previous prime is 11212013339. The next prime is 11212013347. The reversal of 11212013340 is 4331021211.

11212013340 is a `hidden beast` number, since 1 + 121 + 201 + 3 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212013347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12124 + ... + 150236.

It is an arithmetic number, because the mean of its divisors is an integer number (263935854).

Almost surely, 2^11212013340 is an apocalyptic number.

11212013340 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 11212013340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19003381488).

11212013340 is an abundant number, since it is smaller than the sum of its proper divisors (26794749636).

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

11212013340 is a wasteful number, since it uses less digits than its factorization.

11212013340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138180 (or 138175 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11212013340 its reverse (4331021211), we get a palindrome (15543034551).

The spelling of 11212013340 in words is "eleven billion, two hundred twelve million, thirteen thousand, three hundred forty".