1131100232420 has 96 divisors (see below), whose sum is σ = 2552386636800. Its totient is φ = 419758257024.

The previous prime is 1131100232393. The next prime is 1131100232443. The reversal of 1131100232420 is 242320011311.

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 = 1131100232392 and 1131100232401.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5800547 + ... + 5992373.

It is an arithmetic number, because the mean of its divisors is an integer number (26587360800).

Almost surely, 2^{1131100232420} is an apocalyptic number.

1131100232420 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 1131100232420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276193318400).

1131100232420 is an abundant number, since it is smaller than the sum of its proper divisors (1421286404380).

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

1131100232420 is a wasteful number, since it uses less digits than its factorization.

1131100232420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192177 (or 192175 counting only the distinct ones).

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

Adding to 1131100232420 its reverse (242320011311), we get a palindrome (1373420243731).

The spelling of 1131100232420 in words is "one trillion, one hundred thirty-one billion, one hundred million, two hundred thirty-two thousand, four hundred twenty".