20111121344 has 14 divisors (see below), whose sum is σ = 39908006544. Its totient is φ = 10055560640.

The previous prime is 20111121341. The next prime is 20111121379. The reversal of 20111121344 is 44312111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111121341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157118072 + ... + 157118199.

It is an arithmetic number, because the mean of its divisors is an integer number (2850571896).

Almost surely, 2^20111121344 is an apocalyptic number.

It is an amenable number.

20111121344 is a deficient number, since it is larger than the sum of its proper divisors (19796885200).

20111121344 is an equidigital number, since it uses as much as digits as its factorization.

20111121344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314236283 (or 314236273 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 20111121344 its reverse (44312111102), we get a palindrome (64423232446).

The spelling of 20111121344 in words is "twenty billion, one hundred eleven million, one hundred twenty-one thousand, three hundred forty-four".