1011040431320 has 32 divisors (see below), whose sum is σ = 2394569444400. Its totient is φ = 383131110528.

The previous prime is 1011040431311. The next prime is 1011040431389. The reversal of 1011040431320 is 231340401101.

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

It is a junction number, because it is equal to n+sod(n) for n = 1011040431292 and 1011040431301.

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, 665157419 + ... + 665158938.

Almost surely, 2^{1011040431320} is an apocalyptic number.

1011040431320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011040431320 is an abundant number, since it is smaller than the sum of its proper divisors (1383529013080).

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

1011040431320 is a wasteful number, since it uses less digits than its factorization.

1011040431320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330316387 (or 1330316383 counting only the distinct ones).

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

Adding to 1011040431320 its reverse (231340401101), we get a palindrome (1242380832421).

The spelling of 1011040431320 in words is "one trillion, eleven billion, forty million, four hundred thirty-one thousand, three hundred twenty".