1121311500440 has 96 divisors (see below), whose sum is σ = 2676674108160. Its totient is φ = 422692300800.

The previous prime is 1121311500437. The next prime is 1121311500469. The reversal of 1121311500440 is 440051131211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2554760 + ... + 2961320.

It is an arithmetic number, because the mean of its divisors is an integer number (27882021960).

Almost surely, 2^{1121311500440} is an apocalyptic number.

1121311500440 is a gapful number since it is divisible by the number (10) 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 1121311500440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1338337054080).

1121311500440 is an abundant number, since it is smaller than the sum of its proper divisors (1555362607720).

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

1121311500440 is a wasteful number, since it uses less digits than its factorization.

1121311500440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406801 (or 406778 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1121311500440 its reverse (440051131211), we get a palindrome (1561362631651).

The spelling of 1121311500440 in words is "one trillion, one hundred twenty-one billion, three hundred eleven million, five hundred thousand, four hundred forty".