1011321400240 has 40 divisors (see below), whose sum is σ = 2354638780080. Its totient is φ = 403957975296.

The previous prime is 1011321400237. The next prime is 1011321400279. The reversal of 1011321400240 is 420041231101.

It is a tau number, because it is divible by the number of its divisors (40).

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, 8858314 + ... + 8971753.

It is an arithmetic number, because the mean of its divisors is an integer number (58865969502).

Almost surely, 2^{1011321400240} is an apocalyptic number.

1011321400240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011321400240 is an abundant number, since it is smaller than the sum of its proper divisors (1343317379840).

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

1011321400240 is a wasteful number, since it uses less digits than its factorization.

1011321400240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17830789 (or 17830783 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1011321400240 its reverse (420041231101), we get a palindrome (1431362631341).

The spelling of 1011321400240 in words is "one trillion, eleven billion, three hundred twenty-one million, four hundred thousand, two hundred forty".