1031011043240 has 32 divisors (see below), whose sum is σ = 2334550497480. Its totient is φ = 409777635072.

The previous prime is 1031011043213. The next prime is 1031011043243. The reversal of 1031011043240 is 423401101301.

It can be written as a sum of positive squares in 4 ways, for example, as 440686200964 + 590324842276 = 663842^2 + 768326^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (1031011043243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82080587 + ... + 82093146.

Almost surely, 2^{1031011043240} is an apocalyptic number.

1031011043240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031011043240 is an abundant number, since it is smaller than the sum of its proper divisors (1303539454240).

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

1031011043240 is a wasteful number, since it uses less digits than its factorization.

1031011043240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164173901 (or 164173897 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1031011043240 its reverse (423401101301), we get a palindrome (1454412144541).

The spelling of 1031011043240 in words is "one trillion, thirty-one billion, eleven million, forty-three thousand, two hundred forty".