1011131404444 has 24 divisors (see below), whose sum is σ = 2023454573280. Its totient is φ = 433086652416.

The previous prime is 1011131404429. The next prime is 1011131404457. The reversal of 1011131404444 is 4444041311101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10592389 + ... + 10687420.

It is an arithmetic number, because the mean of its divisors is an integer number (84310607220).

Almost surely, 2^{1011131404444} is an apocalyptic number.

1011131404444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1011131404444 is an abundant number, since it is smaller than the sum of its proper divisors (1012323168836).

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

1011131404444 is a wasteful number, since it uses less digits than its factorization.

1011131404444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21281517 (or 21281515 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 1011131404444 its reverse (4444041311101), we get a palindrome (5455172715545).

The spelling of 1011131404444 in words is "one trillion, eleven billion, one hundred thirty-one million, four hundred four thousand, four hundred forty-four".