201111244440 has 128 divisors (see below), whose sum is σ = 619636780800. Its totient is φ = 52198515200.

The previous prime is 201111244429. The next prime is 201111244447. The reversal of 201111244440 is 44442111102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 201111244440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111244447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 574459 + ... + 855701.

It is an arithmetic number, because the mean of its divisors is an integer number (4840912350).

Almost surely, 2^201111244440 is an apocalyptic number.

201111244440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201111244440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309818390400).

201111244440 is an abundant number, since it is smaller than the sum of its proper divisors (418525536360).

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

201111244440 is a wasteful number, since it uses less digits than its factorization.

201111244440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281417 (or 281413 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 201111244440 its reverse (44442111102), we get a palindrome (245553355542).

The spelling of 201111244440 in words is "two hundred one billion, one hundred eleven million, two hundred forty-four thousand, four hundred forty".