1311103024020 has 48 divisors (see below), whose sum is σ = 4078987187520. Its totient is φ = 349627472928.

The previous prime is 1311103023949. The next prime is 1311103024039. The reversal of 1311103024020 is 204203011131.

1311103024020 is a `hidden beast` number, since 1 + 311 + 10 + 302 + 40 + 2 + 0 = 666.

It is a super-2 number, since 2×1311103024020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1311103023984 and 1311103024002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1213983742 + ... + 1213984821.

It is an arithmetic number, because the mean of its divisors is an integer number (84978899740).

Almost surely, 2^{1311103024020} is an apocalyptic number.

1311103024020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311103024020 is an abundant number, since it is smaller than the sum of its proper divisors (2767884163500).

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

1311103024020 is a wasteful number, since it uses less digits than its factorization.

1311103024020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427968581 (or 2427968573 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1311103024020 its reverse (204203011131), we get a palindrome (1515306035151).

The spelling of 1311103024020 in words is "one trillion, three hundred eleven billion, one hundred three million, twenty-four thousand, twenty".