20121103244444 has 6 divisors (see below), whose sum is σ = 35211930677784. Its totient is φ = 10060551622220.

The previous prime is 20121103244441. The next prime is 20121103244453. The reversal of 20121103244444 is 44444230112102.

It is a self number, because there is not a number n which added to its sum of digits gives 20121103244444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121103244441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2515137905552 + ... + 2515137905559.

It is an arithmetic number, because the mean of its divisors is an integer number (5868655112964).

Almost surely, 2^{20121103244444} is an apocalyptic number.

It is an amenable number.

20121103244444 is a deficient number, since it is larger than the sum of its proper divisors (15090827433340).

20121103244444 is a wasteful number, since it uses less digits than its factorization.

20121103244444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030275811115 (or 5030275811113 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 20121103244444 its reverse (44444230112102), we get a palindrome (64565333356546).

The spelling of 20121103244444 in words is "twenty trillion, one hundred twenty-one billion, one hundred three million, two hundred forty-four thousand, four hundred forty-four".