20111321340242 has 32 divisors (see below), whose sum is σ = 32942267550720. Its totient is φ = 9132390852480.

The previous prime is 20111321340233. The next prime is 20111321340247. The reversal of 20111321340242 is 24204312311102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20111321340247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422225684 + ... + 422273312.

It is an arithmetic number, because the mean of its divisors is an integer number (1029445860960).

Almost surely, 2^{20111321340242} is an apocalyptic number.

20111321340242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20111321340242 is a deficient number, since it is larger than the sum of its proper divisors (12830946210478).

20111321340242 is a wasteful number, since it uses less digits than its factorization.

20111321340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66386.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 20111321340242 its reverse (24204312311102), we get a palindrome (44315633651344).

The spelling of 20111321340242 in words is "twenty trillion, one hundred eleven billion, three hundred twenty-one million, three hundred forty thousand, two hundred forty-two".