20111201244 has 36 divisors (see below), whose sum is σ = 53512262440. Its totient is φ = 6350905440.

The previous prime is 20111201221. The next prime is 20111201249. The reversal of 20111201244 is 44210211102.

It is a tau number, because it is divible by the number of its divisors (36).

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 (20111201249) 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 in 11 ways as a sum of consecutive naturals, for example, 14700487 + ... + 14701854.

Almost surely, 2^20111201244 is an apocalyptic number.

It is an amenable number.

20111201244 is an abundant number, since it is smaller than the sum of its proper divisors (33401061196).

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

20111201244 is a wasteful number, since it uses less digits than its factorization.

20111201244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29402370 (or 29402365 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20111201244 its reverse (44210211102), we get a palindrome (64321412346).

The spelling of 20111201244 in words is "twenty billion, one hundred eleven million, two hundred one thousand, two hundred forty-four".