11211321342 has 64 divisors (see below), whose sum is σ = 25812089856. Its totient is φ = 3219152640.

The previous prime is 11211321269. The next prime is 11211321353. The reversal of 11211321342 is 24312311211.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2658 + ... + 149765.

It is an arithmetic number, because the mean of its divisors is an integer number (403313904).

Almost surely, 2^11211321342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11211321342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12906044928).

11211321342 is an abundant number, since it is smaller than the sum of its proper divisors (14600768514).

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

11211321342 is a wasteful number, since it uses less digits than its factorization.

11211321342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152505.

The product of its digits is 288, while the sum is 21.

Adding to 11211321342 its reverse (24312311211), we get a palindrome (35523632553).

The spelling of 11211321342 in words is "eleven billion, two hundred eleven million, three hundred twenty-one thousand, three hundred forty-two".