1131240240220 has 24 divisors (see below), whose sum is σ = 2391336991008. Its totient is φ = 449499432000.

The previous prime is 1131240240217. The next prime is 1131240240241. The reversal of 1131240240220 is 220420421311.

It is a junction number, because it is equal to n+sod(n) for n = 1131240240191 and 1131240240200.

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, 187288411 + ... + 187294450.

It is an arithmetic number, because the mean of its divisors is an integer number (99639041292).

Almost surely, 2^{1131240240220} is an apocalyptic number.

1131240240220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131240240220 is an abundant number, since it is smaller than the sum of its proper divisors (1260096750788).

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

1131240240220 is a wasteful number, since it uses less digits than its factorization.

1131240240220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374583021 (or 374583019 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1131240240220 its reverse (220420421311), we get a palindrome (1351660661531).

The spelling of 1131240240220 in words is "one trillion, one hundred thirty-one billion, two hundred forty million, two hundred forty thousand, two hundred twenty".